feat(sdk): API-Referenz Frontend + Backend-Konsolidierung (Shared Utilities, CRUD Factory)

- API-Referenz Seite (/sdk/api-docs) mit ~690 Endpoints, Suche, Filter, Modul-Index
- Shared db_utils.py (row_to_dict) + tenant_utils Integration in 6 Route-Dateien
- CRUD Factory (crud_factory.py) fuer zukuenftige Module
- Version-Route Auto-Registration in versioning_utils.py
- 1338 Tests bestanden, -232 Zeilen Duplikat-Code

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

backend-compliance/compliance/api/db_utils.py

@@ -0,0 +1,25 @@
+"""
+Shared database utility functions for Compliance API routes.
+
+Provides common helpers used across multiple route files:
+- row_to_dict: Convert SQLAlchemy Row to JSON-safe dict
+"""
+
+from datetime import datetime, date
+from typing import Any, Dict
+
+
+def row_to_dict(row) -> Dict[str, Any]:
+    """Convert a SQLAlchemy Row/RowMapping to a JSON-serializable dict.
+
+    Handles datetime serialization and non-standard types.
+    """
+    result = dict(row._mapping)
+    for key, val in result.items():
+        if isinstance(val, datetime):
+            result[key] = val.isoformat()
+        elif isinstance(val, date):
+            result[key] = val.isoformat()
+        elif hasattr(val, '__str__') and not isinstance(val, (str, int, float, bool, list, dict, type(None))):
+            result[key] = str(val)
+    return result