[split-required] Split final 43 files (500-668 LOC) to complete refactoring

klausur-service (11 files):
- cv_gutter_repair, ocr_pipeline_regression, upload_api
- ocr_pipeline_sessions, smart_spell, nru_worksheet_generator
- ocr_pipeline_overlays, mail/aggregator, zeugnis_api
- cv_syllable_detect, self_rag

backend-lehrer (17 files):
- classroom_engine/suggestions, generators/quiz_generator
- worksheets_api, llm_gateway/comparison, state_engine_api
- classroom/models (→ 4 submodules), services/file_processor
- alerts_agent/api/wizard+digests+routes, content_generators/pdf
- classroom/routes/sessions, llm_gateway/inference
- classroom_engine/analytics, auth/keycloak_auth
- alerts_agent/processing/rule_engine, ai_processor/print_versions

agent-core (5 files):
- brain/memory_store, brain/knowledge_graph, brain/context_manager
- orchestrator/supervisor, sessions/session_manager

admin-lehrer (5 components):
- GridOverlay, StepGridReview, DevOpsPipelineSidebar
- DataFlowDiagram, sbom/wizard/page

website (2 files):
- DependencyMap, lehrer/abitur-archiv

Other: nibis_ingestion, grid_detection_service, export-doclayout-onnx

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

backend-lehrer/classroom/models_context.py

@@ -0,0 +1,128 @@
+"""
+Classroom API - Context, Event, Routine Pydantic Models.
+"""
+
+from typing import Optional
+from pydantic import BaseModel, Field
+
+
+# === Context Models ===
+
+class SchoolInfo(BaseModel):
+    """Schul-Informationen."""
+    federal_state: str
+    federal_state_name: str = ""
+    school_type: str
+    school_type_name: str = ""
+
+
+class SchoolYearInfo(BaseModel):
+    """Schuljahr-Informationen."""
+    id: str
+    start: Optional[str] = None
+    current_week: int = 1
+
+
+class MacroPhaseInfo(BaseModel):
+    """Makro-Phase Informationen."""
+    id: str
+    label: str
+    confidence: float = 1.0
+
+
+class CoreCounts(BaseModel):
+    """Kern-Zaehler fuer den Kontext."""
+    classes: int = 0
+    exams_scheduled: int = 0
+    corrections_pending: int = 0
+
+
+class ContextFlags(BaseModel):
+    """Status-Flags des Kontexts."""
+    onboarding_completed: bool = False
+    has_classes: bool = False
+    has_schedule: bool = False
+    is_exam_period: bool = False
+    is_before_holidays: bool = False
+
+
+class TeacherContextResponse(BaseModel):
+    """Response fuer GET /v1/context."""
+    schema_version: str = "1.0"
+    teacher_id: str
+    school: SchoolInfo
+    school_year: SchoolYearInfo
+    macro_phase: MacroPhaseInfo
+    core_counts: CoreCounts
+    flags: ContextFlags
+
+
+class UpdateContextRequest(BaseModel):
+    """Request zum Aktualisieren des Kontexts."""
+    federal_state: Optional[str] = None
+    school_type: Optional[str] = None
+    schoolyear: Optional[str] = None
+    schoolyear_start: Optional[str] = None
+    macro_phase: Optional[str] = None
+    current_week: Optional[int] = None
+
+
+# === Event Models ===
+
+class CreateEventRequest(BaseModel):
+    """Request zum Erstellen eines Events."""
+    title: str
+    event_type: str = "other"
+    start_date: str
+    end_date: Optional[str] = None
+    class_id: Optional[str] = None
+    subject: Optional[str] = None
+    description: str = ""
+    needs_preparation: bool = True
+    reminder_days_before: int = 7
+
+
+class EventResponse(BaseModel):
+    """Response fuer ein Event."""
+    id: str
+    teacher_id: str
+    event_type: str
+    title: str
+    description: str
+    start_date: str
+    end_date: Optional[str]
+    class_id: Optional[str]
+    subject: Optional[str]
+    status: str
+    needs_preparation: bool
+    preparation_done: bool
+    reminder_days_before: int
+
+
+# === Routine Models ===
+
+class CreateRoutineRequest(BaseModel):
+    """Request zum Erstellen einer Routine."""
+    title: str
+    routine_type: str = "other"
+    recurrence_pattern: str = "weekly"
+    day_of_week: Optional[int] = None
+    day_of_month: Optional[int] = None
+    time_of_day: Optional[str] = None
+    duration_minutes: int = 60
+    description: str = ""
+
+
+class RoutineResponse(BaseModel):
+    """Response fuer eine Routine."""
+    id: str
+    teacher_id: str
+    routine_type: str
+    title: str
+    description: str
+    recurrence_pattern: str
+    day_of_week: Optional[int]
+    day_of_month: Optional[int]
+    time_of_day: Optional[str]
+    duration_minutes: int
+    is_active: bool