Ensure Hygraph sync background task uses fresh session (#89)

Author: shayancoin

backend/api/routes_sync.py

@@ -20,7 +20,7 @@
 from sqlalchemy.orm import Session
 
 from api.config import get_settings
-from api.db import get_db
+from api.db import SessionLocal, get_db
 from api.models import SyncEvent
 from api.security import require_write_token, validate_hygraph_request
 from api.metrics import (

backend/tests/test_sync_routes_metrics.py

@@ -1,12 +1,15 @@
 from __future__ import annotations
+
 import hashlib
 import hmac
 import json
 import re
 
 import pytest
 from fastapi.testclient import TestClient
+from sqlalchemy import text
 
+from api.config import get_settings
 from api.main import app