fix(update_provider_when_message_created): Fix db transaction (#21503)

Signed-off-by: -LAN- <laipz8200@outlook.com>

Author: laipz8200

api/events/event_handlers/update_provider_when_message_created.py

@@ -5,6 +5,7 @@
 
 from pydantic import BaseModel
 from sqlalchemy import update
+from sqlalchemy.orm import Session
 
 from configs import dify_config
 from core.app.entities.app_invoke_entities import AgentChatAppGenerateEntity, ChatAppGenerateEntity
@@ -183,7 +184,7 @@ def _execute_provider_updates(updates_to_perform: list[_ProviderUpdateOperation]
 
     # Use SQLAlchemy's context manager for transaction management
     # This automatically handles commit/rollback
-    with db.session.begin():
+    with Session(db.engine) as session:
         # Use a single transaction for all updates
         for update_operation in updates_to_perform:
             filters = update_operation.filters
@@ -214,7 +215,7 @@ def _execute_provider_updates(updates_to_perform: list[_ProviderUpdateOperation]
 
             # Build and execute the update statement
             stmt = update(Provider).where(*where_conditions).values(**update_values)
-            result = db.session.execute(stmt)
+            result = session.execute(stmt)
             rows_affected = result.rowcount
 
             logger.debug(