fix error

backend/src/api/routes/mappings.py

@@ -13,6 +13,7 @@
 from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.orm import Session
 from typing import List, Optional
+from ...core.logger import belief_scope
 from ...dependencies import get_config_manager
 from ...core.database import get_db
 from ...models.mapping import DatabaseMapping