feat: Implement Role-Based Access Control (RBAC) for search space resources.

-Introduce granular permissions for documents, chats, podcasts, and logs.
- Update routes to enforce permission checks for creating, reading, updating, and deleting resources. - Refactor user and search space interactions to align with RBAC model, removing ownership checks in favor of permission validation.

surfsense_backend/app/routes/__init__.py

@@ -15,12 +15,14 @@ from .llm_config_routes import router as llm_config_router
 from .logs_routes import router as logs_router
 from .luma_add_connector_route import router as luma_add_connector_router
 from .podcasts_routes import router as podcasts_router
+from .rbac_routes import router as rbac_router
 from .search_source_connectors_routes import router as search_source_connectors_router
 from .search_spaces_routes import router as search_spaces_router
 
 router = APIRouter()
 
 router.include_router(search_spaces_router)
+router.include_router(rbac_router)  # RBAC routes for roles, members, invites
 router.include_router(documents_router)
 router.include_router(podcasts_router)
 router.include_router(chats_router)