add rowcount check

api/services/credit_pool_service.py

@@ -1,5 +1,7 @@
 import logging
 
+from typing import cast
+
 from sqlalchemy import CursorResult, update
 from sqlalchemy.orm import Session
 
@@ -61,7 +63,7 @@ class CreditPoolService:
                     TenantCreditPool.quota_used + credits_required <= TenantCreditPool.quota_limit,
                 ]
                 stmt = update(TenantCreditPool).where(*where_conditions).values(**update_values)
-                result: CursorResult = session.execute(stmt)
+                result = cast(CursorResult, session.execute(stmt))
                 session.commit()
                 if result.rowcount == 0:
                     raise QuotaExceededError(