refactor(backend/db): split models.py into per-aggregate modules (1466 -> 85 LOC shim)

The monolithic compliance/db/models.py is decomposed into seven sibling
aggregate modules following the existing repo pattern (dsr_models.py,
vvt_models.py, tom_models.py, etc.):

  regulation_models.py       (134 LOC) — RegulationDB, RequirementDB
  control_models.py          (279 LOC) — ControlDB, ControlMappingDB, EvidenceDB, RiskDB
  ai_system_models.py        (141 LOC) — AISystemDB, AuditExportDB
  service_module_models.py   (176 LOC) — ServiceModuleDB, ModuleRegulationMappingDB, ModuleRiskDB
  audit_session_models.py    (177 LOC) — AuditSessionDB, AuditSignOffDB
  isms_governance_models.py  (323 LOC) — ISMSScope, Context, Policy, Objective, SoA
  isms_audit_models.py       (468 LOC) — AuditFinding, CAPA, ManagementReview, InternalAudit,
                                         AuditTrail, ReadinessCheck

models.py becomes an 85-line re-export shim — every public symbol is
re-exported in dependency order so existing imports work unchanged:

  from compliance.db.models import RegulationDB, ControlDB, AuditFindingDB  # still works

New code SHOULD import from the aggregate module directly; the shim is
for backwards compatibility during the migration.

Schema freeze preserved:
  - __tablename__ byte-identical
  - Column names, types, indexes, constraints byte-identical
  - relationship() string references and back_populates unchanged
  - cascade directives unchanged

Verified:
  - 173/173 pytest compliance/tests/ pass
  - tests/contracts/test_openapi_baseline.py passes (360 paths,
    484 operations — identical to baseline)
  - All new sibling files under the 500-line hard cap
    (largest: isms_audit_models.py at 468 LOC)
  - No file in compliance/db/ now exceeds the hard cap

This is Phase 1 Step 2 from PHASE1_RUNBOOK.md. Phase 1 Step 3 (split
compliance/api/schemas.py, 1899 LOC) is the next target.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend-compliance/compliance/db/ai_system_models.py

@@ -0,0 +1,141 @@
+"""
+AI System & Audit Export models — extracted from compliance/db/models.py.
+
+Covers AI Act system registration/classification and the audit export package
+tracker. Re-exported from ``compliance.db.models`` for backwards compatibility.
+
+DO NOT change __tablename__, column names, or relationship strings.
+"""
+
+import uuid
+import enum
+from datetime import datetime, timezone
+
+from sqlalchemy import (
+    Column, String, Text, Integer, DateTime, Date,
+    Enum, JSON, Index, Float,
+)
+
+from classroom_engine.database import Base
+
+
+# ============================================================================
+# ENUMS
+# ============================================================================
+
+class AIClassificationEnum(str, enum.Enum):
+    """AI Act risk classification."""
+    PROHIBITED = "prohibited"
+    HIGH_RISK = "high-risk"
+    LIMITED_RISK = "limited-risk"
+    MINIMAL_RISK = "minimal-risk"
+    UNCLASSIFIED = "unclassified"
+
+
+class AISystemStatusEnum(str, enum.Enum):
+    """Status of an AI system in compliance tracking."""
+    DRAFT = "draft"
+    CLASSIFIED = "classified"
+    COMPLIANT = "compliant"
+    NON_COMPLIANT = "non-compliant"
+
+
+class ExportStatusEnum(str, enum.Enum):
+    """Status of audit export."""
+    PENDING = "pending"
+    GENERATING = "generating"
+    COMPLETED = "completed"
+    FAILED = "failed"
+
+
+# ============================================================================
+# MODELS
+# ============================================================================
+
+class AISystemDB(Base):
+    """
+    AI System registry for AI Act compliance.
+    Tracks AI systems, their risk classification, and compliance status.
+    """
+    __tablename__ = 'compliance_ai_systems'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    name = Column(String(300), nullable=False)
+    description = Column(Text)
+    purpose = Column(String(500))
+    sector = Column(String(100))
+
+    # AI Act classification
+    classification = Column(Enum(AIClassificationEnum), default=AIClassificationEnum.UNCLASSIFIED)
+    status = Column(Enum(AISystemStatusEnum), default=AISystemStatusEnum.DRAFT)
+
+    # Assessment
+    assessment_date = Column(DateTime)
+    assessment_result = Column(JSON)                                      # Full assessment result
+    obligations = Column(JSON)                                            # List of AI Act obligations
+    risk_factors = Column(JSON)                                           # Risk factors from assessment
+    recommendations = Column(JSON)                                        # Recommendations from assessment
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_ai_system_classification', 'classification'),
+        Index('ix_ai_system_status', 'status'),
+    )
+
+    def __repr__(self):
+        return f"<AISystem {self.name} ({self.classification.value})>"
+
+
+class AuditExportDB(Base):
+    """
+    Tracks audit export packages generated for external auditors.
+    """
+    __tablename__ = 'compliance_audit_exports'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+
+    export_type = Column(String(50), nullable=False)                     # "full", "controls_only", "evidence_only"
+    export_name = Column(String(200))                                    # User-friendly name
+
+    # Scope
+    included_regulations = Column(JSON)                                  # List of regulation codes
+    included_domains = Column(JSON)                                      # List of control domains
+    date_range_start = Column(Date)
+    date_range_end = Column(Date)
+
+    # Generation
+    requested_by = Column(String(100), nullable=False)
+    requested_at = Column(DateTime, nullable=False, default=lambda: datetime.now(timezone.utc))
+    completed_at = Column(DateTime)
+
+    # Output
+    file_path = Column(String(500))
+    file_hash = Column(String(64))                                       # SHA-256 of ZIP
+    file_size_bytes = Column(Integer)
+
+    status = Column(Enum(ExportStatusEnum), default=ExportStatusEnum.PENDING)
+    error_message = Column(Text)
+
+    # Statistics
+    total_controls = Column(Integer)
+    total_evidence = Column(Integer)
+    compliance_score = Column(Float)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    def __repr__(self):
+        return f"<AuditExport {self.export_type} by {self.requested_by}>"
+
+
+__all__ = [
+    "AIClassificationEnum",
+    "AISystemStatusEnum",
+    "ExportStatusEnum",
+    "AISystemDB",
+    "AuditExportDB",
+]

backend-compliance/compliance/db/audit_session_models.py

@@ -0,0 +1,177 @@
+"""
+Audit Session & Sign-Off models — Sprint 3 Phase 3.
+
+Extracted from compliance/db/models.py as the first worked example of the
+Phase 1 model split. The classes are re-exported from compliance.db.models
+for backwards compatibility, so existing imports continue to work unchanged.
+
+Tables:
+- compliance_audit_sessions: Structured compliance audit sessions
+- compliance_audit_signoffs:  Per-requirement sign-offs with digital signatures
+
+DO NOT change __tablename__, column names, or relationship strings — the
+database schema is frozen.
+"""
+
+import uuid
+import enum
+from datetime import datetime, timezone
+
+from sqlalchemy import (
+    Column, String, Text, Integer, DateTime,
+    ForeignKey, Enum, JSON, Index,
+)
+from sqlalchemy.orm import relationship
+
+from classroom_engine.database import Base
+
+
+# ============================================================================
+# ENUMS
+# ============================================================================
+
+class AuditResultEnum(str, enum.Enum):
+    """Result of an audit sign-off for a requirement."""
+    COMPLIANT = "compliant"                    # Fully compliant
+    COMPLIANT_WITH_NOTES = "compliant_notes"   # Compliant with observations
+    NON_COMPLIANT = "non_compliant"            # Not compliant - remediation required
+    NOT_APPLICABLE = "not_applicable"          # Not applicable to this audit
+    PENDING = "pending"                        # Not yet reviewed
+
+
+class AuditSessionStatusEnum(str, enum.Enum):
+    """Status of an audit session."""
+    DRAFT = "draft"                            # Session created, not started
+    IN_PROGRESS = "in_progress"                # Audit in progress
+    COMPLETED = "completed"                    # All items reviewed
+    ARCHIVED = "archived"                      # Historical record
+
+
+# ============================================================================
+# MODELS
+# ============================================================================
+
+class AuditSessionDB(Base):
+    """
+    Audit session for structured compliance reviews.
+
+    Enables auditors to:
+    - Create named audit sessions (e.g., "Q1 2026 GDPR Audit")
+    - Track progress through requirements
+    - Sign off individual items with digital signatures
+    - Generate audit reports
+    """
+    __tablename__ = 'compliance_audit_sessions'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    name = Column(String(200), nullable=False)                              # e.g., "Q1 2026 Compliance Audit"
+    description = Column(Text)
+
+    # Auditor information
+    auditor_name = Column(String(100), nullable=False)                      # e.g., "Dr. Thomas Müller"
+    auditor_email = Column(String(200))
+    auditor_organization = Column(String(200))                              # External auditor company
+
+    # Session scope
+    status = Column(Enum(AuditSessionStatusEnum), default=AuditSessionStatusEnum.DRAFT)
+    regulation_ids = Column(JSON)                                           # Filter: ["GDPR", "AIACT"] or null for all
+
+    # Progress tracking
+    total_items = Column(Integer, default=0)
+    completed_items = Column(Integer, default=0)
+    compliant_count = Column(Integer, default=0)
+    non_compliant_count = Column(Integer, default=0)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    started_at = Column(DateTime)                                           # When audit began
+    completed_at = Column(DateTime)                                         # When audit finished
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    signoffs = relationship("AuditSignOffDB", back_populates="session", cascade="all, delete-orphan")
+
+    __table_args__ = (
+        Index('ix_audit_session_status', 'status'),
+        Index('ix_audit_session_auditor', 'auditor_name'),
+    )
+
+    def __repr__(self):
+        return f"<AuditSession {self.name} ({self.status.value})>"
+
+    @property
+    def completion_percentage(self) -> float:
+        """Calculate completion percentage."""
+        if self.total_items == 0:
+            return 0.0
+        return round((self.completed_items / self.total_items) * 100, 1)
+
+
+class AuditSignOffDB(Base):
+    """
+    Individual sign-off for a requirement within an audit session.
+
+    Features:
+    - Records audit result (compliant, non-compliant, etc.)
+    - Stores auditor notes and observations
+    - Creates digital signature (SHA-256 hash) for tamper evidence
+    """
+    __tablename__ = 'compliance_audit_signoffs'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    session_id = Column(String(36), ForeignKey('compliance_audit_sessions.id'), nullable=False, index=True)
+    requirement_id = Column(String(36), ForeignKey('compliance_requirements.id'), nullable=False, index=True)
+
+    # Audit result
+    result = Column(Enum(AuditResultEnum), default=AuditResultEnum.PENDING)
+    notes = Column(Text)                                                    # Auditor observations
+
+    # Evidence references for this sign-off
+    evidence_ids = Column(JSON)                                             # List of evidence IDs reviewed
+
+    # Digital signature (SHA-256 hash of result + auditor + timestamp)
+    signature_hash = Column(String(64))                                     # SHA-256 hex string
+    signed_at = Column(DateTime)
+    signed_by = Column(String(100))                                         # Auditor name at time of signing
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    session = relationship("AuditSessionDB", back_populates="signoffs")
+    requirement = relationship("RequirementDB")
+
+    __table_args__ = (
+        Index('ix_signoff_session_requirement', 'session_id', 'requirement_id', unique=True),
+        Index('ix_signoff_result', 'result'),
+    )
+
+    def __repr__(self):
+        return f"<AuditSignOff {self.requirement_id}: {self.result.value}>"
+
+    def create_signature(self, auditor_name: str) -> str:
+        """
+        Create a digital signature for this sign-off.
+
+        Returns SHA-256 hash of: result + requirement_id + auditor_name + timestamp
+        """
+        import hashlib
+
+        timestamp = datetime.now(timezone.utc).isoformat()
+        data = f"{self.result.value}|{self.requirement_id}|{auditor_name}|{timestamp}"
+        signature = hashlib.sha256(data.encode()).hexdigest()
+
+        self.signature_hash = signature
+        self.signed_at = datetime.now(timezone.utc)
+        self.signed_by = auditor_name
+
+        return signature
+
+
+__all__ = [
+    "AuditResultEnum",
+    "AuditSessionStatusEnum",
+    "AuditSessionDB",
+    "AuditSignOffDB",
+]

backend-compliance/compliance/db/control_models.py

@@ -0,0 +1,279 @@
+"""
+Control, Evidence, and Risk models — extracted from compliance/db/models.py.
+
+Covers the control framework (ControlDB), requirement↔control mappings,
+evidence artifacts, and the risk register. Re-exported from
+``compliance.db.models`` for backwards compatibility.
+
+DO NOT change __tablename__, column names, or relationship strings.
+"""
+
+import uuid
+import enum
+from datetime import datetime, date, timezone
+
+from sqlalchemy import (
+    Column, String, Text, Integer, Boolean, DateTime, Date,
+    ForeignKey, Enum, JSON, Index,
+)
+from sqlalchemy.orm import relationship
+
+from classroom_engine.database import Base
+
+
+# ============================================================================
+# ENUMS
+# ============================================================================
+
+class ControlTypeEnum(str, enum.Enum):
+    """Type of security control."""
+    PREVENTIVE = "preventive"    # Prevents incidents
+    DETECTIVE = "detective"      # Detects incidents
+    CORRECTIVE = "corrective"    # Corrects after incidents
+
+
+class ControlDomainEnum(str, enum.Enum):
+    """Domain/category of control."""
+    GOVERNANCE = "gov"           # Governance & Organization
+    PRIVACY = "priv"             # Privacy & Data Protection
+    IAM = "iam"                  # Identity & Access Management
+    CRYPTO = "crypto"            # Cryptography & Key Management
+    SDLC = "sdlc"                # Secure Development Lifecycle
+    OPS = "ops"                  # Operations & Monitoring
+    AI = "ai"                    # AI-specific controls
+    CRA = "cra"                  # CRA & Supply Chain
+    AUDIT = "aud"                # Audit & Traceability
+
+
+class ControlStatusEnum(str, enum.Enum):
+    """Implementation status of a control."""
+    PASS = "pass"                # Fully implemented & passing
+    PARTIAL = "partial"          # Partially implemented
+    FAIL = "fail"                # Not passing
+    NOT_APPLICABLE = "n/a"       # Not applicable
+    PLANNED = "planned"          # Planned for implementation
+
+
+class RiskLevelEnum(str, enum.Enum):
+    """Risk severity level."""
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+    CRITICAL = "critical"
+
+
+class EvidenceStatusEnum(str, enum.Enum):
+    """Status of evidence artifact."""
+    VALID = "valid"              # Currently valid
+    EXPIRED = "expired"          # Past validity date
+    PENDING = "pending"          # Awaiting validation
+    FAILED = "failed"            # Failed validation
+
+
+# ============================================================================
+# MODELS
+# ============================================================================
+
+class ControlDB(Base):
+    """
+    Technical or organizational security control.
+
+    Examples: PRIV-001 (Verarbeitungsverzeichnis), SDLC-001 (SAST Scanning)
+    """
+    __tablename__ = 'compliance_controls'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    control_id = Column(String(20), unique=True, nullable=False, index=True)  # e.g., "PRIV-001"
+
+    domain = Column(Enum(ControlDomainEnum), nullable=False, index=True)
+    control_type = Column(Enum(ControlTypeEnum), nullable=False)
+
+    title = Column(String(300), nullable=False)
+    description = Column(Text)
+    pass_criteria = Column(Text, nullable=False)                         # Measurable pass criteria
+    implementation_guidance = Column(Text)                               # How to implement
+
+    # Code/Evidence references
+    code_reference = Column(String(500))                                 # e.g., "backend/middleware/pii_redactor.py:45"
+    documentation_url = Column(String(500))                              # Link to internal docs
+
+    # Automation
+    is_automated = Column(Boolean, default=False)
+    automation_tool = Column(String(100))                                # e.g., "Semgrep", "Trivy"
+    automation_config = Column(JSON)                                     # Tool-specific config
+
+    # Status
+    status = Column(Enum(ControlStatusEnum), default=ControlStatusEnum.PLANNED)
+    status_notes = Column(Text)
+
+    # Ownership & Review
+    owner = Column(String(100))                                          # Responsible person/team
+    review_frequency_days = Column(Integer, default=90)
+    last_reviewed_at = Column(DateTime)
+    next_review_at = Column(DateTime)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    mappings = relationship("ControlMappingDB", back_populates="control", cascade="all, delete-orphan")
+    evidence = relationship("EvidenceDB", back_populates="control", cascade="all, delete-orphan")
+
+    __table_args__ = (
+        Index('ix_control_domain_status', 'domain', 'status'),
+    )
+
+    def __repr__(self):
+        return f"<Control {self.control_id}: {self.title}>"
+
+
+class ControlMappingDB(Base):
+    """
+    Maps requirements to controls (many-to-many with metadata).
+    """
+    __tablename__ = 'compliance_control_mappings'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    requirement_id = Column(String(36), ForeignKey('compliance_requirements.id'), nullable=False, index=True)
+    control_id = Column(String(36), ForeignKey('compliance_controls.id'), nullable=False, index=True)
+
+    coverage_level = Column(String(20), default="full")                  # "full", "partial", "planned"
+    notes = Column(Text)                                                 # Explanation of coverage
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    requirement = relationship("RequirementDB", back_populates="control_mappings")
+    control = relationship("ControlDB", back_populates="mappings")
+
+    __table_args__ = (
+        Index('ix_mapping_req_ctrl', 'requirement_id', 'control_id', unique=True),
+    )
+
+
+class EvidenceDB(Base):
+    """
+    Audit evidence for controls.
+
+    Types: scan_report, policy_document, config_snapshot, test_result,
+           manual_upload, screenshot, external_link
+    """
+    __tablename__ = 'compliance_evidence'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    control_id = Column(String(36), ForeignKey('compliance_controls.id'), nullable=False, index=True)
+
+    evidence_type = Column(String(50), nullable=False)                   # Type of evidence
+    title = Column(String(300), nullable=False)
+    description = Column(Text)
+
+    # File/Link storage
+    artifact_path = Column(String(500))                                  # Local file path
+    artifact_url = Column(String(500))                                   # External URL
+    artifact_hash = Column(String(64))                                   # SHA-256 hash
+    file_size_bytes = Column(Integer)
+    mime_type = Column(String(100))
+
+    # Validity period
+    valid_from = Column(DateTime, nullable=False, default=lambda: datetime.now(timezone.utc))
+    valid_until = Column(DateTime)                                       # NULL = no expiry
+    status = Column(Enum(EvidenceStatusEnum), default=EvidenceStatusEnum.VALID)
+
+    # Source tracking
+    source = Column(String(100))                                         # "ci_pipeline", "manual", "api"
+    ci_job_id = Column(String(100))                                      # CI/CD job reference
+    uploaded_by = Column(String(100))                                    # User who uploaded
+
+    # Timestamps
+    collected_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    control = relationship("ControlDB", back_populates="evidence")
+
+    __table_args__ = (
+        Index('ix_evidence_control_type', 'control_id', 'evidence_type'),
+        Index('ix_evidence_status', 'status'),
+    )
+
+    def __repr__(self):
+        return f"<Evidence {self.evidence_type}: {self.title}>"
+
+
+class RiskDB(Base):
+    """
+    Risk register entry with likelihood x impact scoring.
+    """
+    __tablename__ = 'compliance_risks'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    risk_id = Column(String(20), unique=True, nullable=False, index=True)  # e.g., "RISK-001"
+
+    title = Column(String(300), nullable=False)
+    description = Column(Text)
+    category = Column(String(50), nullable=False)                        # "data_breach", "compliance_gap", etc.
+
+    # Inherent risk (before controls)
+    likelihood = Column(Integer, nullable=False)                         # 1-5
+    impact = Column(Integer, nullable=False)                             # 1-5
+    inherent_risk = Column(Enum(RiskLevelEnum), nullable=False)
+
+    # Mitigating controls
+    mitigating_controls = Column(JSON)                                   # List of control_ids
+
+    # Residual risk (after controls)
+    residual_likelihood = Column(Integer)
+    residual_impact = Column(Integer)
+    residual_risk = Column(Enum(RiskLevelEnum))
+
+    # Management
+    owner = Column(String(100))
+    status = Column(String(20), default="open")                          # "open", "mitigated", "accepted", "transferred"
+    treatment_plan = Column(Text)
+
+    # Review
+    identified_date = Column(Date, default=date.today)
+    review_date = Column(Date)
+    last_assessed_at = Column(DateTime)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_risk_category_status', 'category', 'status'),
+        Index('ix_risk_inherent', 'inherent_risk'),
+    )
+
+    def __repr__(self):
+        return f"<Risk {self.risk_id}: {self.title}>"
+
+    @staticmethod
+    def calculate_risk_level(likelihood: int, impact: int) -> RiskLevelEnum:
+        """Calculate risk level from likelihood x impact matrix."""
+        score = likelihood * impact
+        if score >= 20:
+            return RiskLevelEnum.CRITICAL
+        elif score >= 12:
+            return RiskLevelEnum.HIGH
+        elif score >= 6:
+            return RiskLevelEnum.MEDIUM
+        else:
+            return RiskLevelEnum.LOW
+
+
+__all__ = [
+    "ControlTypeEnum",
+    "ControlDomainEnum",
+    "ControlStatusEnum",
+    "RiskLevelEnum",
+    "EvidenceStatusEnum",
+    "ControlDB",
+    "ControlMappingDB",
+    "EvidenceDB",
+    "RiskDB",
+]

backend-compliance/compliance/db/isms_audit_models.py

@@ -0,0 +1,468 @@
+"""
+ISMS Audit Execution models (ISO 27001 Kapitel 9-10) — extracted from
+compliance/db/models.py.
+
+Covers findings, corrective actions (CAPA), management reviews, internal
+audits, audit trail, and readiness checks. The governance side (scope,
+context, policies, objectives, SoA) lives in ``isms_governance_models.py``.
+
+Re-exported from ``compliance.db.models`` for backwards compatibility.
+
+DO NOT change __tablename__, column names, or relationship strings.
+"""
+
+import uuid
+import enum
+from datetime import datetime, date, timezone
+
+from sqlalchemy import (
+    Column, String, Text, Integer, Boolean, DateTime, Date,
+    ForeignKey, Enum, JSON, Index, Float,
+)
+from sqlalchemy.orm import relationship
+
+from classroom_engine.database import Base
+
+
+# ============================================================================
+# ENUMS
+# ============================================================================
+
+class FindingTypeEnum(str, enum.Enum):
+    """ISO 27001 audit finding classification."""
+    MAJOR = "major"              # Major nonconformity - blocks certification
+    MINOR = "minor"              # Minor nonconformity - requires CAPA
+    OFI = "ofi"                  # Opportunity for Improvement
+    POSITIVE = "positive"        # Positive observation
+
+
+class FindingStatusEnum(str, enum.Enum):
+    """Status of an audit finding."""
+    OPEN = "open"
+    IN_PROGRESS = "in_progress"
+    CORRECTIVE_ACTION_PENDING = "capa_pending"
+    VERIFICATION_PENDING = "verification_pending"
+    VERIFIED = "verified"
+    CLOSED = "closed"
+
+
+class CAPATypeEnum(str, enum.Enum):
+    """Type of corrective/preventive action."""
+    CORRECTIVE = "corrective"    # Fix the nonconformity
+    PREVENTIVE = "preventive"    # Prevent recurrence
+    BOTH = "both"
+
+
+# ============================================================================
+# MODELS
+# ============================================================================
+
+class AuditFindingDB(Base):
+    """
+    Audit Finding with ISO 27001 Classification (Major/Minor/OFI)
+
+    Tracks findings from internal and external audits with proper
+    classification and CAPA workflow.
+    """
+    __tablename__ = 'compliance_audit_findings'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    finding_id = Column(String(30), unique=True, nullable=False, index=True)  # e.g., "FIND-2026-001"
+
+    # Source
+    audit_session_id = Column(String(36), ForeignKey('compliance_audit_sessions.id'), index=True)
+    internal_audit_id = Column(String(36), ForeignKey('compliance_internal_audits.id'), index=True)
+
+    # Classification (CRITICAL for ISO 27001!)
+    finding_type = Column(Enum(FindingTypeEnum), nullable=False)
+
+    # ISO reference
+    iso_chapter = Column(String(20))                            # e.g., "6.1.2", "9.2"
+    annex_a_control = Column(String(20))                        # e.g., "A.8.2"
+
+    # Finding details
+    title = Column(String(300), nullable=False)
+    description = Column(Text, nullable=False)
+    objective_evidence = Column(Text, nullable=False)           # What the auditor observed
+
+    # Root cause analysis
+    root_cause = Column(Text)
+    root_cause_method = Column(String(50))                      # "5-why", "fishbone", "pareto"
+
+    # Impact assessment
+    impact_description = Column(Text)
+    affected_processes = Column(JSON)
+    affected_assets = Column(JSON)
+
+    # Status tracking
+    status = Column(Enum(FindingStatusEnum), default=FindingStatusEnum.OPEN)
+
+    # Responsibility
+    owner = Column(String(100))                                 # Person responsible for closure
+    auditor = Column(String(100))                               # Auditor who raised finding
+
+    # Dates
+    identified_date = Column(Date, nullable=False, default=date.today)
+    due_date = Column(Date)                                     # Deadline for closure
+    closed_date = Column(Date)
+
+    # Verification
+    verification_method = Column(Text)
+    verified_by = Column(String(100))
+    verified_at = Column(DateTime)
+    verification_evidence = Column(Text)
+
+    # Closure
+    closure_notes = Column(Text)
+    closed_by = Column(String(100))
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    corrective_actions = relationship("CorrectiveActionDB", back_populates="finding", cascade="all, delete-orphan")
+
+    __table_args__ = (
+        Index('ix_finding_type_status', 'finding_type', 'status'),
+        Index('ix_finding_due_date', 'due_date'),
+    )
+
+    def __repr__(self):
+        return f"<AuditFinding {self.finding_id}: {self.finding_type.value}>"
+
+    @property
+    def is_blocking(self) -> bool:
+        """Major findings block certification."""
+        return self.finding_type == FindingTypeEnum.MAJOR and self.status != FindingStatusEnum.CLOSED
+
+
+class CorrectiveActionDB(Base):
+    """
+    Corrective & Preventive Actions (CAPA) - ISO 27001 10.1
+
+    Tracks actions taken to address nonconformities.
+    """
+    __tablename__ = 'compliance_corrective_actions'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    capa_id = Column(String(30), unique=True, nullable=False, index=True)  # e.g., "CAPA-2026-001"
+
+    # Link to finding
+    finding_id = Column(String(36), ForeignKey('compliance_audit_findings.id'), nullable=False, index=True)
+
+    # Type
+    capa_type = Column(Enum(CAPATypeEnum), nullable=False)
+
+    # Action details
+    title = Column(String(300), nullable=False)
+    description = Column(Text, nullable=False)
+    expected_outcome = Column(Text)
+
+    # Responsibility
+    assigned_to = Column(String(100), nullable=False)
+    approved_by = Column(String(100))
+
+    # Timeline
+    planned_start = Column(Date)
+    planned_completion = Column(Date, nullable=False)
+    actual_completion = Column(Date)
+
+    # Status
+    status = Column(String(30), default="planned")              # planned, in_progress, completed, verified, cancelled
+    progress_percentage = Column(Integer, default=0)
+
+    # Resources
+    estimated_effort_hours = Column(Integer)
+    actual_effort_hours = Column(Integer)
+    resources_required = Column(Text)
+
+    # Evidence of implementation
+    implementation_evidence = Column(Text)
+    evidence_ids = Column(JSON)
+
+    # Effectiveness review
+    effectiveness_criteria = Column(Text)
+    effectiveness_verified = Column(Boolean, default=False)
+    effectiveness_verification_date = Column(Date)
+    effectiveness_notes = Column(Text)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    finding = relationship("AuditFindingDB", back_populates="corrective_actions")
+
+    __table_args__ = (
+        Index('ix_capa_status', 'status'),
+        Index('ix_capa_due', 'planned_completion'),
+    )
+
+    def __repr__(self):
+        return f"<CAPA {self.capa_id}: {self.capa_type.value}>"
+
+
+class ManagementReviewDB(Base):
+    """
+    Management Review (ISO 27001 Kapitel 9.3)
+
+    Records mandatory management reviews of the ISMS.
+    """
+    __tablename__ = 'compliance_management_reviews'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    review_id = Column(String(30), unique=True, nullable=False, index=True)  # e.g., "MR-2026-Q1"
+
+    # Review details
+    title = Column(String(200), nullable=False)
+    review_date = Column(Date, nullable=False)
+    review_period_start = Column(Date)                          # Period being reviewed
+    review_period_end = Column(Date)
+
+    # Participants
+    chairperson = Column(String(100), nullable=False)           # Usually top management
+    attendees = Column(JSON)                                    # List of {"name": "", "role": ""}
+
+    # 9.3 Review Inputs (mandatory!)
+    input_previous_actions = Column(Text)                       # Status of previous review actions
+    input_isms_changes = Column(Text)                           # Changes in internal/external issues
+    input_security_performance = Column(Text)                   # Nonconformities, monitoring, audit results
+    input_interested_party_feedback = Column(Text)
+    input_risk_assessment_results = Column(Text)
+    input_improvement_opportunities = Column(Text)
+
+    # Additional inputs
+    input_policy_effectiveness = Column(Text)
+    input_objective_achievement = Column(Text)
+    input_resource_adequacy = Column(Text)
+
+    # 9.3 Review Outputs (mandatory!)
+    output_improvement_decisions = Column(Text)                 # Decisions for improvement
+    output_isms_changes = Column(Text)                          # Changes needed to ISMS
+    output_resource_needs = Column(Text)                        # Resource requirements
+
+    # Action items
+    action_items = Column(JSON)                                 # List of {"action": "", "owner": "", "due_date": ""}
+
+    # Overall assessment
+    isms_effectiveness_rating = Column(String(20))              # "effective", "partially_effective", "not_effective"
+    key_decisions = Column(Text)
+
+    # Approval
+    status = Column(String(30), default="draft")                # draft, conducted, approved
+    approved_by = Column(String(100))
+    approved_at = Column(DateTime)
+    minutes_document_path = Column(String(500))                 # Link to meeting minutes
+
+    # Next review
+    next_review_date = Column(Date)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_mgmt_review_date', 'review_date'),
+        Index('ix_mgmt_review_status', 'status'),
+    )
+
+    def __repr__(self):
+        return f"<ManagementReview {self.review_id}: {self.review_date}>"
+
+
+class InternalAuditDB(Base):
+    """
+    Internal Audit (ISO 27001 Kapitel 9.2)
+
+    Tracks internal audit program and individual audits.
+    """
+    __tablename__ = 'compliance_internal_audits'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    audit_id = Column(String(30), unique=True, nullable=False, index=True)  # e.g., "IA-2026-001"
+
+    # Audit details
+    title = Column(String(200), nullable=False)
+    audit_type = Column(String(50), nullable=False)             # "scheduled", "surveillance", "special"
+
+    # Scope
+    scope_description = Column(Text, nullable=False)
+    iso_chapters_covered = Column(JSON)                         # e.g., ["4", "5", "6.1"]
+    annex_a_controls_covered = Column(JSON)                     # e.g., ["A.5", "A.6"]
+    processes_covered = Column(JSON)
+    departments_covered = Column(JSON)
+
+    # Audit criteria
+    criteria = Column(Text)                                     # Standards, policies being audited against
+
+    # Timeline
+    planned_date = Column(Date, nullable=False)
+    actual_start_date = Column(Date)
+    actual_end_date = Column(Date)
+
+    # Audit team
+    lead_auditor = Column(String(100), nullable=False)
+    audit_team = Column(JSON)                                   # List of auditor names
+    auditee_representatives = Column(JSON)                      # Who was interviewed
+
+    # Status
+    status = Column(String(30), default="planned")              # planned, in_progress, completed, cancelled
+
+    # Results summary
+    total_findings = Column(Integer, default=0)
+    major_findings = Column(Integer, default=0)
+    minor_findings = Column(Integer, default=0)
+    ofi_count = Column(Integer, default=0)
+    positive_observations = Column(Integer, default=0)
+
+    # Conclusion
+    audit_conclusion = Column(Text)
+    overall_assessment = Column(String(30))                     # "conforming", "minor_nc", "major_nc"
+
+    # Report
+    report_date = Column(Date)
+    report_document_path = Column(String(500))
+
+    # Sign-off
+    report_approved_by = Column(String(100))
+    report_approved_at = Column(DateTime)
+
+    # Follow-up
+    follow_up_audit_required = Column(Boolean, default=False)
+    follow_up_audit_id = Column(String(36))
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    findings = relationship("AuditFindingDB", backref="internal_audit", foreign_keys=[AuditFindingDB.internal_audit_id])
+
+    __table_args__ = (
+        Index('ix_internal_audit_date', 'planned_date'),
+        Index('ix_internal_audit_status', 'status'),
+    )
+
+    def __repr__(self):
+        return f"<InternalAudit {self.audit_id}: {self.title}>"
+
+
+class AuditTrailDB(Base):
+    """
+    Comprehensive Audit Trail for ISMS Changes
+
+    Tracks all changes to compliance-relevant data for
+    accountability and forensic analysis.
+    """
+    __tablename__ = 'compliance_audit_trail'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+
+    # What changed
+    entity_type = Column(String(50), nullable=False, index=True)  # "control", "risk", "policy", etc.
+    entity_id = Column(String(36), nullable=False, index=True)
+    entity_name = Column(String(200))                           # Human-readable identifier
+
+    # Action
+    action = Column(String(20), nullable=False)                 # "create", "update", "delete", "approve", "sign"
+
+    # Change details
+    field_changed = Column(String(100))                         # Which field (for updates)
+    old_value = Column(Text)
+    new_value = Column(Text)
+    change_summary = Column(Text)                               # Human-readable summary
+
+    # Who & When
+    performed_by = Column(String(100), nullable=False)
+    performed_at = Column(DateTime, nullable=False, default=lambda: datetime.now(timezone.utc))
+
+    # Context
+    ip_address = Column(String(45))
+    user_agent = Column(String(500))
+    session_id = Column(String(100))
+
+    # Integrity
+    checksum = Column(String(64))                               # SHA-256 of the change
+
+    # Timestamps (immutable after creation)
+    created_at = Column(DateTime, nullable=False, default=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_audit_trail_entity', 'entity_type', 'entity_id'),
+        Index('ix_audit_trail_time', 'performed_at'),
+        Index('ix_audit_trail_user', 'performed_by'),
+    )
+
+    def __repr__(self):
+        return f"<AuditTrail {self.action} on {self.entity_type}/{self.entity_id}>"
+
+
+class ISMSReadinessCheckDB(Base):
+    """
+    ISMS Readiness Check Results
+
+    Stores automated pre-audit checks to identify potential
+    Major findings before external audit.
+    """
+    __tablename__ = 'compliance_isms_readiness'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+
+    # Check run
+    check_date = Column(DateTime, nullable=False, default=lambda: datetime.now(timezone.utc))
+    triggered_by = Column(String(100))                          # "scheduled", "manual", "pre-audit"
+
+    # Overall status
+    overall_status = Column(String(20), nullable=False)         # "ready", "at_risk", "not_ready"
+    certification_possible = Column(Boolean, nullable=False)
+
+    # Chapter-by-chapter status (ISO 27001)
+    chapter_4_status = Column(String(20))                       # Context
+    chapter_5_status = Column(String(20))                       # Leadership
+    chapter_6_status = Column(String(20))                       # Planning
+    chapter_7_status = Column(String(20))                       # Support
+    chapter_8_status = Column(String(20))                       # Operation
+    chapter_9_status = Column(String(20))                       # Performance
+    chapter_10_status = Column(String(20))                      # Improvement
+
+    # Potential Major findings
+    potential_majors = Column(JSON)                             # List of {"check": "", "status": "", "recommendation": ""}
+
+    # Potential Minor findings
+    potential_minors = Column(JSON)
+
+    # Improvement opportunities
+    improvement_opportunities = Column(JSON)
+
+    # Scores
+    readiness_score = Column(Float)                             # 0-100
+    documentation_score = Column(Float)
+    implementation_score = Column(Float)
+    evidence_score = Column(Float)
+
+    # Recommendations
+    priority_actions = Column(JSON)                             # List of recommended actions before audit
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_readiness_date', 'check_date'),
+        Index('ix_readiness_status', 'overall_status'),
+    )
+
+    def __repr__(self):
+        return f"<ISMSReadiness {self.check_date}: {self.overall_status}>"
+
+
+__all__ = [
+    "FindingTypeEnum",
+    "FindingStatusEnum",
+    "CAPATypeEnum",
+    "AuditFindingDB",
+    "CorrectiveActionDB",
+    "ManagementReviewDB",
+    "InternalAuditDB",
+    "AuditTrailDB",
+    "ISMSReadinessCheckDB",
+]

backend-compliance/compliance/db/isms_governance_models.py

@@ -0,0 +1,323 @@
+"""
+ISMS Governance models (ISO 27001 Kapitel 4-6) — extracted from compliance/db/models.py.
+
+Covers the documentation and planning side of the ISMS: scope, context,
+policies, security objectives, and the Statement of Applicability. The audit
+execution side (findings, CAPA, management reviews, internal audits, audit
+trail, readiness checks) lives in ``isms_audit_models.py``.
+
+Re-exported from ``compliance.db.models`` for backwards compatibility.
+
+DO NOT change __tablename__, column names, or relationship strings — the
+database schema is frozen.
+"""
+
+import uuid
+import enum
+from datetime import datetime, date, timezone
+
+from sqlalchemy import (
+    Column, String, Text, Integer, Boolean, DateTime, Date,
+    ForeignKey, Enum, JSON, Index,
+)
+
+from classroom_engine.database import Base
+
+
+# ============================================================================
+# SHARED GOVERNANCE ENUMS
+# ============================================================================
+
+class ApprovalStatusEnum(str, enum.Enum):
+    """Approval status for ISMS documents."""
+    DRAFT = "draft"
+    UNDER_REVIEW = "under_review"
+    APPROVED = "approved"
+    SUPERSEDED = "superseded"
+
+
+# ============================================================================
+# MODELS
+# ============================================================================
+
+class ISMSScopeDB(Base):
+    """
+    ISMS Scope Definition (ISO 27001 Kapitel 4.3)
+
+    Defines the boundaries and applicability of the ISMS.
+    This is MANDATORY for certification.
+    """
+    __tablename__ = 'compliance_isms_scope'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    version = Column(String(20), nullable=False, default="1.0")
+
+    # Scope definition
+    scope_statement = Column(Text, nullable=False)              # Main scope text
+    included_locations = Column(JSON)                           # List of locations
+    included_processes = Column(JSON)                           # List of processes
+    included_services = Column(JSON)                            # List of services/products
+    excluded_items = Column(JSON)                               # Explicitly excluded items
+    exclusion_justification = Column(Text)                      # Why items are excluded
+
+    # Boundaries
+    organizational_boundary = Column(Text)                      # Legal entity, departments
+    physical_boundary = Column(Text)                            # Locations, networks
+    technical_boundary = Column(Text)                           # Systems, applications
+
+    # Approval
+    status = Column(Enum(ApprovalStatusEnum), default=ApprovalStatusEnum.DRAFT)
+    approved_by = Column(String(100))
+    approved_at = Column(DateTime)
+    approval_signature = Column(String(64))                     # SHA-256 hash
+
+    # Validity
+    effective_date = Column(Date)
+    review_date = Column(Date)                                  # Next mandatory review
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+    created_by = Column(String(100))
+    updated_by = Column(String(100))
+
+    __table_args__ = (
+        Index('ix_isms_scope_status', 'status'),
+    )
+
+    def __repr__(self):
+        return f"<ISMSScope v{self.version} ({self.status.value})>"
+
+
+class ISMSContextDB(Base):
+    """
+    ISMS Context (ISO 27001 Kapitel 4.1, 4.2)
+
+    Documents internal/external issues and interested parties.
+    """
+    __tablename__ = 'compliance_isms_context'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    version = Column(String(20), nullable=False, default="1.0")
+
+    # 4.1 Internal issues
+    internal_issues = Column(JSON)                              # List of {"issue": "", "impact": "", "treatment": ""}
+
+    # 4.1 External issues
+    external_issues = Column(JSON)                              # List of {"issue": "", "impact": "", "treatment": ""}
+
+    # 4.2 Interested parties
+    interested_parties = Column(JSON)                           # List of {"party": "", "requirements": [], "relevance": ""}
+
+    # Legal/regulatory requirements
+    regulatory_requirements = Column(JSON)                      # DSGVO, AI Act, etc.
+    contractual_requirements = Column(JSON)                     # Customer contracts
+
+    # Analysis
+    swot_strengths = Column(JSON)
+    swot_weaknesses = Column(JSON)
+    swot_opportunities = Column(JSON)
+    swot_threats = Column(JSON)
+
+    # Approval
+    status = Column(Enum(ApprovalStatusEnum), default=ApprovalStatusEnum.DRAFT)
+    approved_by = Column(String(100))
+    approved_at = Column(DateTime)
+
+    # Review
+    last_reviewed_at = Column(DateTime)
+    next_review_date = Column(Date)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    def __repr__(self):
+        return f"<ISMSContext v{self.version}>"
+
+
+class ISMSPolicyDB(Base):
+    """
+    ISMS Policies (ISO 27001 Kapitel 5.2)
+
+    Information security policy and sub-policies.
+    """
+    __tablename__ = 'compliance_isms_policies'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    policy_id = Column(String(30), unique=True, nullable=False, index=True)  # e.g., "POL-ISMS-001"
+
+    # Policy details
+    title = Column(String(200), nullable=False)
+    policy_type = Column(String(50), nullable=False)            # "master", "operational", "technical"
+    description = Column(Text)
+    policy_text = Column(Text, nullable=False)                  # Full policy content
+
+    # Scope
+    applies_to = Column(JSON)                                   # Roles, departments, systems
+
+    # Document control
+    version = Column(String(20), nullable=False, default="1.0")
+    status = Column(Enum(ApprovalStatusEnum), default=ApprovalStatusEnum.DRAFT)
+
+    # Approval chain
+    authored_by = Column(String(100))
+    reviewed_by = Column(String(100))
+    approved_by = Column(String(100))                           # Must be top management
+    approved_at = Column(DateTime)
+    approval_signature = Column(String(64))
+
+    # Validity
+    effective_date = Column(Date)
+    review_frequency_months = Column(Integer, default=12)
+    next_review_date = Column(Date)
+
+    # References
+    parent_policy_id = Column(String(36), ForeignKey('compliance_isms_policies.id'))
+    related_controls = Column(JSON)                             # List of control_ids
+
+    # Document path
+    document_path = Column(String(500))                         # Link to full document
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_policy_type_status', 'policy_type', 'status'),
+    )
+
+    def __repr__(self):
+        return f"<ISMSPolicy {self.policy_id}: {self.title}>"
+
+
+class SecurityObjectiveDB(Base):
+    """
+    Security Objectives (ISO 27001 Kapitel 6.2)
+
+    Measurable information security objectives.
+    """
+    __tablename__ = 'compliance_security_objectives'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    objective_id = Column(String(30), unique=True, nullable=False, index=True)  # e.g., "OBJ-001"
+
+    # Objective definition
+    title = Column(String(200), nullable=False)
+    description = Column(Text)
+    category = Column(String(50))                               # "availability", "confidentiality", "integrity", "compliance"
+
+    # SMART criteria
+    specific = Column(Text)                                     # What exactly
+    measurable = Column(Text)                                   # How measured
+    achievable = Column(Text)                                   # Is it realistic
+    relevant = Column(Text)                                     # Why important
+    time_bound = Column(Text)                                   # Deadline
+
+    # Metrics
+    kpi_name = Column(String(100))
+    kpi_target = Column(String(100))                            # Target value
+    kpi_current = Column(String(100))                           # Current value
+    kpi_unit = Column(String(50))                               # %, count, score
+    measurement_frequency = Column(String(50))                  # monthly, quarterly
+
+    # Responsibility
+    owner = Column(String(100))
+    accountable = Column(String(100))                           # RACI: Accountable
+
+    # Status
+    status = Column(String(30), default="active")               # active, achieved, not_achieved, cancelled
+    progress_percentage = Column(Integer, default=0)
+
+    # Timeline
+    target_date = Column(Date)
+    achieved_date = Column(Date)
+
+    # Linked items
+    related_controls = Column(JSON)
+    related_risks = Column(JSON)
+
+    # Approval
+    approved_by = Column(String(100))
+    approved_at = Column(DateTime)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_objective_status', 'status'),
+        Index('ix_objective_category', 'category'),
+    )
+
+    def __repr__(self):
+        return f"<SecurityObjective {self.objective_id}: {self.title}>"
+
+
+class StatementOfApplicabilityDB(Base):
+    """
+    Statement of Applicability (SoA) - ISO 27001 Anhang A Mapping
+
+    Documents which Annex A controls are applicable and why.
+    This is MANDATORY for certification.
+    """
+    __tablename__ = 'compliance_soa'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+
+    # ISO 27001:2022 Annex A reference
+    annex_a_control = Column(String(20), nullable=False, index=True)  # e.g., "A.5.1"
+    annex_a_title = Column(String(300), nullable=False)
+    annex_a_category = Column(String(100))                      # "Organizational", "People", "Physical", "Technological"
+
+    # Applicability decision
+    is_applicable = Column(Boolean, nullable=False)
+    applicability_justification = Column(Text, nullable=False)  # MUST be documented
+
+    # Implementation status
+    implementation_status = Column(String(30), default="planned")  # planned, partial, implemented, not_implemented
+    implementation_notes = Column(Text)
+
+    # Mapping to our controls
+    breakpilot_control_ids = Column(JSON)                       # List of our control_ids that address this
+    coverage_level = Column(String(20), default="full")         # full, partial, planned
+
+    # Evidence
+    evidence_description = Column(Text)
+    evidence_ids = Column(JSON)                                 # Links to EvidenceDB
+
+    # Risk-based justification (for exclusions)
+    risk_assessment_notes = Column(Text)                        # If not applicable, explain why
+    compensating_controls = Column(Text)                        # If partial, explain compensating measures
+
+    # Approval
+    reviewed_by = Column(String(100))
+    reviewed_at = Column(DateTime)
+    approved_by = Column(String(100))
+    approved_at = Column(DateTime)
+
+    # Version tracking
+    version = Column(String(20), default="1.0")
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    __table_args__ = (
+        Index('ix_soa_annex_control', 'annex_a_control', unique=True),
+        Index('ix_soa_applicable', 'is_applicable'),
+        Index('ix_soa_status', 'implementation_status'),
+    )
+
+    def __repr__(self):
+        return f"<SoA {self.annex_a_control}: {'Applicable' if self.is_applicable else 'N/A'}>"
+
+
+__all__ = [
+    "ApprovalStatusEnum",
+    "ISMSScopeDB",
+    "ISMSContextDB",
+    "ISMSPolicyDB",
+    "SecurityObjectiveDB",
+    "StatementOfApplicabilityDB",
+]

backend-compliance/compliance/db/regulation_models.py

@@ -0,0 +1,134 @@
+"""
+Regulation & Requirement models — extracted from compliance/db/models.py.
+
+The foundational compliance aggregate: regulations (GDPR, AI Act, CRA, ...) and
+the individual requirements they contain. Re-exported from
+``compliance.db.models`` for backwards compatibility.
+
+DO NOT change __tablename__, column names, or relationship strings.
+"""
+
+import uuid
+import enum
+from datetime import datetime, timezone
+
+from sqlalchemy import (
+    Column, String, Text, Integer, Boolean, DateTime, Date,
+    ForeignKey, Enum, JSON, Index,
+)
+from sqlalchemy.orm import relationship
+
+from classroom_engine.database import Base
+
+
+# ============================================================================
+# ENUMS
+# ============================================================================
+
+class RegulationTypeEnum(str, enum.Enum):
+    """Type of regulation/standard."""
+    EU_REGULATION = "eu_regulation"      # Directly applicable EU law
+    EU_DIRECTIVE = "eu_directive"        # Requires national implementation
+    DE_LAW = "de_law"                    # German national law
+    BSI_STANDARD = "bsi_standard"        # BSI technical guidelines
+    INDUSTRY_STANDARD = "industry_standard"  # ISO, OWASP, etc.
+
+
+# ============================================================================
+# MODELS
+# ============================================================================
+
+class RegulationDB(Base):
+    """
+    Represents a regulation, directive, or standard.
+
+    Examples: GDPR, AI Act, CRA, BSI-TR-03161
+    """
+    __tablename__ = 'compliance_regulations'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    code = Column(String(20), unique=True, nullable=False, index=True)  # e.g., "GDPR", "AIACT"
+    name = Column(String(200), nullable=False)                           # Short name
+    full_name = Column(Text)                                             # Full official name
+    regulation_type = Column(Enum(RegulationTypeEnum), nullable=False)
+    source_url = Column(String(500))                                     # EUR-Lex URL or similar
+    local_pdf_path = Column(String(500))                                 # Local PDF if available
+    effective_date = Column(Date)                                        # When it came into force
+    description = Column(Text)                                           # Brief description
+    is_active = Column(Boolean, default=True)
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    requirements = relationship("RequirementDB", back_populates="regulation", cascade="all, delete-orphan")
+
+    def __repr__(self):
+        return f"<Regulation {self.code}: {self.name}>"
+
+
+class RequirementDB(Base):
+    """
+    Individual requirement from a regulation.
+
+    Examples: GDPR Art. 32(1)(a), AI Act Art. 9, BSI-TR O.Auth_1
+    """
+    __tablename__ = 'compliance_requirements'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    regulation_id = Column(String(36), ForeignKey('compliance_regulations.id'), nullable=False, index=True)
+
+    # Requirement identification
+    article = Column(String(50), nullable=False)                         # e.g., "Art. 32", "O.Auth_1"
+    paragraph = Column(String(20))                                       # e.g., "(1)(a)"
+    requirement_id_external = Column(String(50))                         # External ID (e.g., BSI ID)
+    title = Column(String(300), nullable=False)                          # Requirement title
+    description = Column(Text)                                           # Brief description
+    requirement_text = Column(Text)                                      # Original text from regulation
+
+    # Breakpilot-specific interpretation and implementation
+    breakpilot_interpretation = Column(Text)                             # How Breakpilot interprets this
+    implementation_status = Column(String(30), default="not_started")    # not_started, in_progress, implemented, verified
+    implementation_details = Column(Text)                                # How we implemented it
+    code_references = Column(JSON)                                       # List of {"file": "...", "line": ..., "description": "..."}
+    documentation_links = Column(JSON)                                   # List of internal doc links
+
+    # Evidence for auditors
+    evidence_description = Column(Text)                                  # What evidence proves compliance
+    evidence_artifacts = Column(JSON)                                    # List of {"type": "...", "path": "...", "description": "..."}
+
+    # Audit-specific fields
+    auditor_notes = Column(Text)                                         # Notes from auditor review
+    audit_status = Column(String(30), default="pending")                 # pending, in_review, approved, rejected
+    last_audit_date = Column(DateTime)
+    last_auditor = Column(String(100))
+
+    is_applicable = Column(Boolean, default=True)                        # Applicable to Breakpilot?
+    applicability_reason = Column(Text)                                  # Why/why not applicable
+
+    priority = Column(Integer, default=2)                                # 1=Critical, 2=High, 3=Medium
+
+    # Source document reference
+    source_page = Column(Integer)                                        # Page number in source document
+    source_section = Column(String(100))                                 # Section in source document
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    regulation = relationship("RegulationDB", back_populates="requirements")
+    control_mappings = relationship("ControlMappingDB", back_populates="requirement", cascade="all, delete-orphan")
+
+    __table_args__ = (
+        Index('ix_requirement_regulation_article', 'regulation_id', 'article'),
+        Index('ix_requirement_audit_status', 'audit_status'),
+        Index('ix_requirement_impl_status', 'implementation_status'),
+    )
+
+    def __repr__(self):
+        return f"<Requirement {self.article} {self.paragraph or ''}>"
+
+
+__all__ = ["RegulationTypeEnum", "RegulationDB", "RequirementDB"]

backend-compliance/compliance/db/service_module_models.py

@@ -0,0 +1,176 @@
+"""
+Service Module Registry models — extracted from compliance/db/models.py.
+
+Sprint 3: registry of all Breakpilot services/modules for compliance mapping,
+per-module regulation applicability, and per-module risk aggregation.
+Re-exported from ``compliance.db.models`` for backwards compatibility.
+
+DO NOT change __tablename__, column names, or relationship strings.
+"""
+
+import uuid
+import enum
+from datetime import datetime, timezone
+
+from sqlalchemy import (
+    Column, String, Text, Integer, Boolean, DateTime,
+    ForeignKey, Enum, JSON, Index, Float,
+)
+from sqlalchemy.orm import relationship
+
+from classroom_engine.database import Base
+# RiskLevelEnum is re-used across aggregates; sourced here from control_models.
+from compliance.db.control_models import RiskLevelEnum  # noqa: F401
+
+
+# ============================================================================
+# ENUMS
+# ============================================================================
+
+class ServiceTypeEnum(str, enum.Enum):
+    """Type of Breakpilot service/module."""
+    BACKEND = "backend"           # API/Backend services
+    DATABASE = "database"         # Data storage
+    AI = "ai"                     # AI/ML services
+    COMMUNICATION = "communication"  # Chat/Video/Messaging
+    STORAGE = "storage"           # File/Object storage
+    INFRASTRUCTURE = "infrastructure"  # Load balancer, reverse proxy
+    MONITORING = "monitoring"     # Logging, metrics
+    SECURITY = "security"         # Auth, encryption, secrets
+
+
+class RelevanceLevelEnum(str, enum.Enum):
+    """Relevance level of a regulation to a service."""
+    CRITICAL = "critical"         # Non-compliance = shutdown
+    HIGH = "high"                 # Major risk
+    MEDIUM = "medium"             # Moderate risk
+    LOW = "low"                   # Minor risk
+
+
+# ============================================================================
+# MODELS
+# ============================================================================
+
+class ServiceModuleDB(Base):
+    """
+    Registry of all Breakpilot services/modules for compliance mapping.
+
+    Tracks which regulations apply to which services, enabling:
+    - Service-specific compliance views
+    - Aggregated risk per service
+    - Gap analysis by module
+    """
+    __tablename__ = 'compliance_service_modules'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    name = Column(String(100), unique=True, nullable=False, index=True)  # e.g., "consent-service"
+    display_name = Column(String(200), nullable=False)                     # e.g., "Go Consent Service"
+    description = Column(Text)
+
+    # Technical details
+    service_type = Column(Enum(ServiceTypeEnum), nullable=False)
+    port = Column(Integer)                                                 # Primary port (if applicable)
+    technology_stack = Column(JSON)                                        # e.g., ["Go", "Gin", "PostgreSQL"]
+    repository_path = Column(String(500))                                  # e.g., "/consent-service"
+    docker_image = Column(String(200))                                     # e.g., "breakpilot-pwa-consent-service"
+
+    # Data categories handled
+    data_categories = Column(JSON)                                         # e.g., ["personal_data", "consent_records"]
+    processes_pii = Column(Boolean, default=False)                         # Handles personally identifiable info?
+    processes_health_data = Column(Boolean, default=False)                 # Handles special category health data?
+    ai_components = Column(Boolean, default=False)                         # Contains AI/ML components?
+
+    # Status
+    is_active = Column(Boolean, default=True)
+    criticality = Column(String(20), default="medium")                     # "critical", "high", "medium", "low"
+
+    # Compliance aggregation
+    compliance_score = Column(Float)                                       # Calculated score 0-100
+    last_compliance_check = Column(DateTime)
+
+    # Owner
+    owner_team = Column(String(100))                                       # e.g., "Backend Team"
+    owner_contact = Column(String(200))                                    # e.g., "backend@breakpilot.app"
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    regulation_mappings = relationship("ModuleRegulationMappingDB", back_populates="module", cascade="all, delete-orphan")
+    module_risks = relationship("ModuleRiskDB", back_populates="module", cascade="all, delete-orphan")
+
+    __table_args__ = (
+        Index('ix_module_type_active', 'service_type', 'is_active'),
+    )
+
+    def __repr__(self):
+        return f"<ServiceModule {self.name}: {self.display_name}>"
+
+
+class ModuleRegulationMappingDB(Base):
+    """
+    Maps services to applicable regulations with relevance level.
+
+    Enables filtering: "Show all GDPR requirements for consent-service"
+    """
+    __tablename__ = 'compliance_module_regulations'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    module_id = Column(String(36), ForeignKey('compliance_service_modules.id'), nullable=False, index=True)
+    regulation_id = Column(String(36), ForeignKey('compliance_regulations.id'), nullable=False, index=True)
+
+    relevance_level = Column(Enum(RelevanceLevelEnum), nullable=False, default=RelevanceLevelEnum.MEDIUM)
+    notes = Column(Text)                                                   # Why this regulation applies
+    applicable_articles = Column(JSON)                                     # List of specific articles that apply
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    module = relationship("ServiceModuleDB", back_populates="regulation_mappings")
+    regulation = relationship("RegulationDB")
+
+    __table_args__ = (
+        Index('ix_module_regulation', 'module_id', 'regulation_id', unique=True),
+    )
+
+
+class ModuleRiskDB(Base):
+    """
+    Service-specific risks aggregated from requirements and controls.
+    """
+    __tablename__ = 'compliance_module_risks'
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    module_id = Column(String(36), ForeignKey('compliance_service_modules.id'), nullable=False, index=True)
+    risk_id = Column(String(36), ForeignKey('compliance_risks.id'), nullable=False, index=True)
+
+    # Module-specific assessment
+    module_likelihood = Column(Integer)                                    # 1-5, may differ from global
+    module_impact = Column(Integer)                                        # 1-5, may differ from global
+    module_risk_level = Column(Enum(RiskLevelEnum))
+
+    assessment_notes = Column(Text)                                        # Module-specific notes
+
+    # Timestamps
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+    # Relationships
+    module = relationship("ServiceModuleDB", back_populates="module_risks")
+    risk = relationship("RiskDB")
+
+    __table_args__ = (
+        Index('ix_module_risk', 'module_id', 'risk_id', unique=True),
+    )
+
+
+__all__ = [
+    "ServiceTypeEnum",
+    "RelevanceLevelEnum",
+    "ServiceModuleDB",
+    "ModuleRegulationMappingDB",
+    "ModuleRiskDB",
+]