[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_templates.py

@@ -0,0 +1,158 @@
+"""
+Classroom API - Template, Homework, Material Pydantic Models.
+"""
+
+from typing import Dict, List, Optional
+from pydantic import BaseModel, Field
+
+
+# === Template Models ===
+
+class TemplateCreate(BaseModel):
+    """Request zum Erstellen einer Vorlage."""
+    name: str = Field(..., min_length=1, max_length=200, description="Name der Vorlage")
+    description: str = Field("", max_length=1000, description="Beschreibung")
+    subject: str = Field("", max_length=100, description="Fach")
+    grade_level: str = Field("", max_length=50, description="Klassenstufe (z.B. '7', '10')")
+    phase_durations: Optional[Dict[str, int]] = Field(
+        None,
+        description="Phasendauern in Minuten"
+    )
+    default_topic: str = Field("", max_length=500, description="Vorausgefuelltes Thema")
+    default_notes: str = Field("", description="Vorausgefuellte Notizen")
+    is_public: bool = Field(False, description="Vorlage fuer alle sichtbar?")
+
+
+class TemplateUpdate(BaseModel):
+    """Request zum Aktualisieren einer Vorlage."""
+    name: Optional[str] = Field(None, min_length=1, max_length=200)
+    description: Optional[str] = Field(None, max_length=1000)
+    subject: Optional[str] = Field(None, max_length=100)
+    grade_level: Optional[str] = Field(None, max_length=50)
+    phase_durations: Optional[Dict[str, int]] = None
+    default_topic: Optional[str] = Field(None, max_length=500)
+    default_notes: Optional[str] = None
+    is_public: Optional[bool] = None
+
+
+class TemplateResponse(BaseModel):
+    """Response fuer eine einzelne Vorlage."""
+    template_id: str
+    teacher_id: str
+    name: str
+    description: str
+    subject: str
+    grade_level: str
+    phase_durations: Dict[str, int]
+    default_topic: str
+    default_notes: str
+    is_public: bool
+    usage_count: int
+    total_duration_minutes: int
+    created_at: Optional[str]
+    updated_at: Optional[str]
+    is_system_template: bool = False
+
+
+class TemplateListResponse(BaseModel):
+    """Response fuer Template-Liste."""
+    templates: List[TemplateResponse]
+    total_count: int
+
+
+# === Homework Models ===
+
+class CreateHomeworkRequest(BaseModel):
+    """Request zum Erstellen einer Hausaufgabe."""
+    teacher_id: str
+    class_id: str
+    subject: str
+    title: str = Field(..., max_length=300)
+    description: str = ""
+    session_id: Optional[str] = None
+    due_date: Optional[str] = Field(None, description="ISO-Format Datum")
+
+
+class UpdateHomeworkRequest(BaseModel):
+    """Request zum Aktualisieren einer Hausaufgabe."""
+    title: Optional[str] = Field(None, max_length=300)
+    description: Optional[str] = None
+    due_date: Optional[str] = Field(None, description="ISO-Format Datum")
+    status: Optional[str] = Field(None, description="assigned, in_progress, completed")
+
+
+class HomeworkResponse(BaseModel):
+    """Response fuer eine Hausaufgabe."""
+    homework_id: str
+    teacher_id: str
+    class_id: str
+    subject: str
+    title: str
+    description: str
+    session_id: Optional[str]
+    due_date: Optional[str]
+    status: str
+    is_overdue: bool
+    created_at: Optional[str]
+    updated_at: Optional[str]
+
+
+class HomeworkListResponse(BaseModel):
+    """Response fuer Liste von Hausaufgaben."""
+    homework: List[HomeworkResponse]
+    total: int
+
+
+# === Material Models ===
+
+class CreateMaterialRequest(BaseModel):
+    """Request zum Erstellen eines Materials."""
+    teacher_id: str
+    title: str = Field(..., max_length=300)
+    material_type: str = Field("document", description="document, link, video, image, worksheet, presentation, other")
+    url: Optional[str] = Field(None, max_length=2000)
+    description: str = ""
+    phase: Optional[str] = Field(None, description="einstieg, erarbeitung, sicherung, transfer, reflexion")
+    subject: str = ""
+    grade_level: str = ""
+    tags: List[str] = []
+    is_public: bool = False
+    session_id: Optional[str] = None
+
+
+class UpdateMaterialRequest(BaseModel):
+    """Request zum Aktualisieren eines Materials."""
+    title: Optional[str] = Field(None, max_length=300)
+    material_type: Optional[str] = None
+    url: Optional[str] = Field(None, max_length=2000)
+    description: Optional[str] = None
+    phase: Optional[str] = None
+    subject: Optional[str] = None
+    grade_level: Optional[str] = None
+    tags: Optional[List[str]] = None
+    is_public: Optional[bool] = None
+
+
+class MaterialResponse(BaseModel):
+    """Response fuer ein Material."""
+    material_id: str
+    teacher_id: str
+    title: str
+    material_type: str
+    url: Optional[str]
+    description: str
+    phase: Optional[str]
+    subject: str
+    grade_level: str
+    tags: List[str]
+    is_public: bool
+    usage_count: int
+    session_id: Optional[str]
+    created_at: Optional[str]
+    updated_at: Optional[str]
+
+
+class MaterialListResponse(BaseModel):
+    """Response fuer Liste von Materialien."""
+    materials: List[MaterialResponse]
+    total: int