refactor: use session factory instead of call db.session directly (#31198)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/tasks/workflow_execution_tasks.py

@@ -10,11 +10,10 @@ import logging
 
 from celery import shared_task
 from sqlalchemy import select
-from sqlalchemy.orm import sessionmaker
 
+from core.db.session_factory import session_factory
 from core.workflow.entities.workflow_execution import WorkflowExecution
 from core.workflow.workflow_type_encoder import WorkflowRuntimeTypeConverter
-from extensions.ext_database import db
 from models import CreatorUserRole, WorkflowRun
 from models.enums import WorkflowRunTriggeredFrom
 
@@ -46,10 +45,7 @@ def save_workflow_execution_task(
         True if successful, False otherwise
     """
     try:
-        # Create a new session for this task
-        session_factory = sessionmaker(bind=db.engine, expire_on_commit=False)
-
-        with session_factory() as session:
+        with session_factory.create_session() as session:
             # Deserialize execution data
             execution = WorkflowExecution.model_validate(execution_data)