refactor(workflow_cycle_manager): Refactors `_workflow_parallel_branch_start_to_stream_response`

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

api/core/app/apps/advanced_chat/generate_task_pipeline.py

@@ -392,18 +392,11 @@ class AdvancedChatAppGenerateTaskPipeline:
                 if not self._workflow_run_id:
                     raise ValueError("workflow run not initialized.")
 
-                with Session(db.engine, expire_on_commit=False) as session:
-                    workflow_run = self._workflow_cycle_manager._get_workflow_run(
-                        session=session, workflow_run_id=self._workflow_run_id
-                    )
-                    parallel_start_resp = (
-                        self._workflow_cycle_manager._workflow_parallel_branch_start_to_stream_response(
-                            session=session,
+                parallel_start_resp = self._workflow_cycle_manager._workflow_parallel_branch_start_to_stream_response(
                     task_id=self._application_generate_entity.task_id,
-                            workflow_run=workflow_run,
+                    workflow_execution_id=self._workflow_run_id,
                     event=event,
                 )
-                    )
 
                 yield parallel_start_resp
             elif isinstance(event, QueueParallelBranchRunSucceededEvent | QueueParallelBranchRunFailedEvent):

api/core/workflow/workflow_app_generate_task_pipeline.py

@@ -344,18 +344,11 @@ class WorkflowAppGenerateTaskPipeline:
                 if not self._workflow_run_id:
                     raise ValueError("workflow run not initialized.")
 
-                with Session(db.engine, expire_on_commit=False) as session:
-                    workflow_run = self._workflow_cycle_manager._get_workflow_run(
-                        session=session, workflow_run_id=self._workflow_run_id
-                    )
-                    parallel_start_resp = (
-                        self._workflow_cycle_manager._workflow_parallel_branch_start_to_stream_response(
-                            session=session,
+                parallel_start_resp = self._workflow_cycle_manager._workflow_parallel_branch_start_to_stream_response(
                     task_id=self._application_generate_entity.task_id,
-                            workflow_run=workflow_run,
+                    workflow_execution_id=self._workflow_run_id,
                     event=event,
                 )
-                    )
 
                 yield parallel_start_resp
 

api/core/workflow/workflow_cycle_manager.py

@@ -631,12 +631,15 @@ class WorkflowCycleManager:
         )
 
     def _workflow_parallel_branch_start_to_stream_response(
-        self, *, session: Session, task_id: str, workflow_run: WorkflowRun, event: QueueParallelBranchRunStartedEvent
+        self,
+        *,
+        task_id: str,
+        workflow_execution_id: str,
+        event: QueueParallelBranchRunStartedEvent,
     ) -> ParallelBranchStartStreamResponse:
-        _ = session
         return ParallelBranchStartStreamResponse(
             task_id=task_id,
-            workflow_run_id=workflow_run.id,
+            workflow_run_id=workflow_execution_id,
             data=ParallelBranchStartStreamResponse.Data(
                 parallel_id=event.parallel_id,
                 parallel_branch_id=event.parallel_start_node_id,