feat(extraction): POST /compliance/extract-requirements-from-rag

Sucht alle RAG-Kollektionen nach Prüfaspekten und legt automatisch
Anforderungen in der DB an. Kernfeatures:

- Durchsucht alle 6 RAG-Kollektionen parallel (bp_compliance_ce,
  bp_compliance_recht, bp_compliance_gesetze, bp_compliance_datenschutz,
  bp_dsfa_corpus, bp_legal_templates)
- Erkennt BSI Prüfaspekte (O.Purp_6) im Artikel-Feld und per Regex
- Dedupliziert nach (regulation_code, article) — safe to call many times
- Auto-erstellt Regulations-Stubs für unbekannte regulation_codes
- dry_run=true zeigt was erstellt würde ohne DB-Schreibzugriff
- Optionale Filter: collections, regulation_codes, search_queries
- 18 Tests (alle bestanden)
- Frontend: "Aus RAG extrahieren" Button auf /sdk/requirements

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend-compliance/compliance/api/__init__.py

@@ -25,6 +25,7 @@ from .dsfa_routes import router as dsfa_router
 from .dsr_routes import router as dsr_router
 from .email_template_routes import router as email_template_router
 from .banner_routes import router as banner_router
+from .extraction_routes import router as extraction_router
 
 # Include sub-routers
 router.include_router(audit_router)
@@ -51,6 +52,7 @@ router.include_router(dsfa_router)
 router.include_router(dsr_router)
 router.include_router(email_template_router)
 router.include_router(banner_router)
+router.include_router(extraction_router)
 
 __all__ = [
     "router",