fix: fehlende get_canonical_service Factory + BaseModel Imports

canonical_control_routes: get_canonical_service() Dependency-Factory
fehlte nach Refactoring → alle /v1/canonical/* Endpoints gaben 404.

dsfa_routes: pydantic BaseModel Import fehlte → Router lud nicht.

Startup-Log vorher: "Loaded 37/41 compliance sub-routers"
Startup-Log nachher: "Loaded 41/41 compliance sub-routers" (erwartet)

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

backend-compliance/compliance/api/canonical_control_routes.py

@@ -49,6 +49,11 @@ from compliance.services.canonical_control_service import (
 router = APIRouter(prefix="/v1/canonical", tags=["canonical-controls"])
 
 
+def get_canonical_service(db: Session = Depends(get_db)):
+    """FastAPI dependency that creates a CanonicalControlService instance."""
+    return CanonicalControlService(db)
+
+
 # =============================================================================
 # RESPONSE MODELS
 # =============================================================================