refactor(backend/api): extract Notfallplan schemas + services (Step 4)

Split notfallplan_routes.py (1018 LOC) into clean architecture layers:
- compliance/schemas/notfallplan.py (146 LOC): all Pydantic models
- compliance/services/notfallplan_service.py (500 LOC): contacts, scenarios, checklists, exercises, stats
- compliance/services/notfallplan_workflow_service.py (309 LOC): incidents, templates
- compliance/api/notfallplan_routes.py (361 LOC): thin handlers with domain error translation

All 250 tests pass. Schemas re-exported via __all__ for legacy test imports.

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

backend-compliance/compliance/schemas/notfallplan.py

@@ -0,0 +1,146 @@
+"""
+Notfallplan (Emergency Plan) schemas -- Art. 33/34 DSGVO.
+
+Phase 1 Step 4: extracted from ``compliance.api.notfallplan_routes``.
+"""
+
+from typing import Any, List, Optional
+
+from pydantic import BaseModel
+
+
+# ============================================================================
+# Contacts
+# ============================================================================
+
+
+class ContactCreate(BaseModel):
+    name: str
+    role: Optional[str] = None
+    email: Optional[str] = None
+    phone: Optional[str] = None
+    is_primary: bool = False
+    available_24h: bool = False
+
+
+class ContactUpdate(BaseModel):
+    name: Optional[str] = None
+    role: Optional[str] = None
+    email: Optional[str] = None
+    phone: Optional[str] = None
+    is_primary: Optional[bool] = None
+    available_24h: Optional[bool] = None
+
+
+# ============================================================================
+# Scenarios
+# ============================================================================
+
+
+class ScenarioCreate(BaseModel):
+    title: str
+    category: Optional[str] = None
+    severity: str = "medium"
+    description: Optional[str] = None
+    response_steps: List[Any] = []
+    estimated_recovery_time: Optional[int] = None
+    is_active: bool = True
+
+
+class ScenarioUpdate(BaseModel):
+    title: Optional[str] = None
+    category: Optional[str] = None
+    severity: Optional[str] = None
+    description: Optional[str] = None
+    response_steps: Optional[List[Any]] = None
+    estimated_recovery_time: Optional[int] = None
+    last_tested: Optional[str] = None
+    is_active: Optional[bool] = None
+
+
+# ============================================================================
+# Checklists
+# ============================================================================
+
+
+class ChecklistCreate(BaseModel):
+    title: str
+    scenario_id: Optional[str] = None
+    description: Optional[str] = None
+    order_index: int = 0
+    is_required: bool = True
+
+
+class ChecklistUpdate(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    order_index: Optional[int] = None
+    is_required: Optional[bool] = None
+
+
+# ============================================================================
+# Exercises
+# ============================================================================
+
+
+class ExerciseCreate(BaseModel):
+    title: str
+    scenario_id: Optional[str] = None
+    exercise_type: str = "tabletop"
+    exercise_date: Optional[str] = None
+    participants: List[Any] = []
+    outcome: Optional[str] = None
+    notes: Optional[str] = None
+
+
+# ============================================================================
+# Incidents
+# ============================================================================
+
+
+class IncidentCreate(BaseModel):
+    title: str
+    description: Optional[str] = None
+    detected_by: Optional[str] = None
+    status: str = "detected"
+    severity: str = "medium"
+    affected_data_categories: List[Any] = []
+    estimated_affected_persons: int = 0
+    measures: List[Any] = []
+    art34_required: bool = False
+    art34_justification: Optional[str] = None
+
+
+class IncidentUpdate(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    detected_by: Optional[str] = None
+    status: Optional[str] = None
+    severity: Optional[str] = None
+    affected_data_categories: Optional[List[Any]] = None
+    estimated_affected_persons: Optional[int] = None
+    measures: Optional[List[Any]] = None
+    art34_required: Optional[bool] = None
+    art34_justification: Optional[str] = None
+    reported_to_authority_at: Optional[str] = None
+    notified_affected_at: Optional[str] = None
+    closed_at: Optional[str] = None
+    closed_by: Optional[str] = None
+    lessons_learned: Optional[str] = None
+
+
+# ============================================================================
+# Templates
+# ============================================================================
+
+
+class TemplateCreate(BaseModel):
+    type: str = "art33"
+    title: str
+    content: str
+
+
+class TemplateUpdate(BaseModel):
+    type: Optional[str] = None
+    title: Optional[str] = None
+    content: Optional[str] = None