feat: queue-based graph engine

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

api/controllers/web/workflow.py

@@ -21,6 +21,7 @@ from core.errors.error import (
     QuotaExceededError,
 )
 from core.model_runtime.errors.invoke import InvokeError
+from core.workflow.graph_engine.manager import GraphEngineManager
 from libs import helper
 from models.model import App, AppMode, EndUser
 from services.app_generate_service import AppGenerateService
@@ -75,7 +76,12 @@ class WorkflowTaskStopApi(WebApiResource):
         if app_mode != AppMode.WORKFLOW:
             raise NotWorkflowAppError()
 
-        AppQueueManager.set_stop_flag(task_id, InvokeFrom.WEB_APP, end_user.id)
+        # Stop using both mechanisms for backward compatibility
+        # Legacy stop flag mechanism (without user check)
+        AppQueueManager.set_stop_flag_no_user_check(task_id)
+
+        # New graph engine command channel mechanism
+        GraphEngineManager.send_stop_command(task_id)
 
         return {"result": "success"}