fix: export_service import, UTC import in backup_service

app/routes/contacts.py

@@ -33,6 +33,7 @@ from app.schemas.contact import (
 )
 from app.services import contact_service
 from app.services import dedup_service
+from app.services import export_service
 
 router = APIRouter(prefix="/api/v1/contacts", tags=["contacts"])
 

app/services/backup_service.py

@@ -6,7 +6,7 @@ import asyncio
 import logging
 import os
 import uuid
-from datetime import datetime
+from datetime import datetime, timezone
 from pathlib import Path
 
 from sqlalchemy import select
@@ -97,7 +97,7 @@ async def create_backup(
     """
     _ensure_backup_dir()
 
-    timestamp = datetime.now(UTC).strftime("%Y%m%d_%H%M%S")
+    timestamp = datetime.now(timezone.utc).strftime("%Y%m%d_%H%M%S")
     filename = f"leocrm_backup_{tenant_id}_{timestamp}.dump"
     filepath = BACKUP_DIR / filename
 
@@ -232,7 +232,7 @@ async def restore_backup(
             raise RuntimeError(f"pg_restore failed: {result.stderr[:200]}")
 
         backup.status = "restored"
-        backup.restored_at = datetime.now(UTC)
+        backup.restored_at = datetime.now(timezone.utc)
         await db.commit()
         logger.info("Backup %s restored successfully", backup_id)
         return backup