[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_analytics.py

@@ -0,0 +1,161 @@
+"""
+Classroom API - Analytics, Reflection, Feedback, Settings Pydantic Models.
+"""
+
+from typing import Dict, List, Optional, Any
+from pydantic import BaseModel, Field
+
+
+# === Analytics Models ===
+
+class SessionSummaryResponse(BaseModel):
+    """Response fuer Session-Summary."""
+    session_id: str
+    teacher_id: str
+    class_id: str
+    subject: str
+    topic: Optional[str]
+    date: Optional[str]
+    date_formatted: str
+    total_duration_seconds: int
+    total_duration_formatted: str
+    planned_duration_seconds: int
+    planned_duration_formatted: str
+    phases_completed: int
+    total_phases: int
+    completion_percentage: int
+    phase_statistics: List[Dict[str, Any]]
+    total_overtime_seconds: int
+    total_overtime_formatted: str
+    phases_with_overtime: int
+    total_pause_count: int
+    total_pause_seconds: int
+    reflection_notes: str = ""
+    reflection_rating: Optional[int] = None
+    key_learnings: List[str] = []
+
+
+class TeacherAnalyticsResponse(BaseModel):
+    """Response fuer Lehrer-Analytics."""
+    teacher_id: str
+    period_start: Optional[str]
+    period_end: Optional[str]
+    total_sessions: int
+    completed_sessions: int
+    total_teaching_minutes: int
+    total_teaching_hours: float
+    avg_phase_durations: Dict[str, int]
+    sessions_with_overtime: int
+    overtime_percentage: int
+    avg_overtime_seconds: int
+    avg_overtime_formatted: str
+    most_overtime_phase: Optional[str]
+    avg_pause_count: float
+    avg_pause_duration_seconds: int
+    subjects_taught: Dict[str, int]
+    classes_taught: Dict[str, int]
+
+
+class ReflectionCreate(BaseModel):
+    """Request-Body fuer Reflection-Erstellung."""
+    session_id: str
+    teacher_id: str
+    notes: str = ""
+    overall_rating: Optional[int] = Field(None, ge=1, le=5)
+    what_worked: List[str] = []
+    improvements: List[str] = []
+    notes_for_next_lesson: str = ""
+
+
+class ReflectionUpdate(BaseModel):
+    """Request-Body fuer Reflection-Update."""
+    notes: Optional[str] = None
+    overall_rating: Optional[int] = Field(None, ge=1, le=5)
+    what_worked: Optional[List[str]] = None
+    improvements: Optional[List[str]] = None
+    notes_for_next_lesson: Optional[str] = None
+
+
+class ReflectionResponse(BaseModel):
+    """Response fuer eine einzelne Reflection."""
+    reflection_id: str
+    session_id: str
+    teacher_id: str
+    notes: str
+    overall_rating: Optional[int]
+    what_worked: List[str]
+    improvements: List[str]
+    notes_for_next_lesson: str
+    created_at: Optional[str]
+    updated_at: Optional[str]
+
+
+# === Feedback Models ===
+
+class FeedbackCreate(BaseModel):
+    """Request zum Erstellen von Feedback."""
+    title: str = Field(..., min_length=3, max_length=500, description="Kurzer Titel")
+    description: str = Field(..., min_length=10, description="Beschreibung")
+    feedback_type: str = Field("improvement", description="bug, feature_request, improvement, praise, question")
+    priority: str = Field("medium", description="critical, high, medium, low")
+    teacher_name: str = Field("", description="Name des Lehrers")
+    teacher_email: str = Field("", description="E-Mail fuer Rueckfragen")
+    context_url: str = Field("", description="URL wo Feedback gegeben wurde")
+    context_phase: str = Field("", description="Aktuelle Phase")
+    context_session_id: Optional[str] = Field(None, description="Session-ID falls aktiv")
+    related_feature: Optional[str] = Field(None, description="Verwandtes Feature")
+
+
+class FeedbackResponse(BaseModel):
+    """Response fuer Feedback."""
+    id: str
+    teacher_id: str
+    teacher_name: str
+    title: str
+    description: str
+    feedback_type: str
+    priority: str
+    status: str
+    created_at: str
+    response: Optional[str] = None
+
+
+class FeedbackListResponse(BaseModel):
+    """Liste von Feedbacks."""
+    feedbacks: List[Dict[str, Any]]
+    total: int
+
+
+class FeedbackStatsResponse(BaseModel):
+    """Feedback-Statistiken."""
+    total: int
+    by_status: Dict[str, int]
+    by_type: Dict[str, int]
+    by_priority: Dict[str, int]
+
+
+# === Settings Models ===
+
+class TeacherSettingsResponse(BaseModel):
+    """Response fuer Lehrer-Einstellungen."""
+    teacher_id: str
+    default_phase_durations: Dict[str, int]
+    audio_enabled: bool = True
+    high_contrast: bool = False
+    show_statistics: bool = True
+
+
+class UpdatePhaseDurationsRequest(BaseModel):
+    """Request zum Aktualisieren der Phasen-Dauern."""
+    durations: Dict[str, int] = Field(
+        ...,
+        description="Phasen-Dauern in Minuten, z.B. {'einstieg': 10, 'erarbeitung': 25}",
+        examples=[{"einstieg": 10, "erarbeitung": 25, "sicherung": 10, "transfer": 8, "reflexion": 5}]
+    )
+
+
+class UpdatePreferencesRequest(BaseModel):
+    """Request zum Aktualisieren der UI-Praeferenzen."""
+    audio_enabled: Optional[bool] = None
+    high_contrast: Optional[bool] = None
+    show_statistics: Optional[bool] = None