feat: knowledge pipeline (#25360)

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api/controllers/console/explore/workflow.py

@@ -20,6 +20,7 @@ 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 libs.login import current_user
 from models.model import AppMode, InstalledApp
@@ -82,6 +83,11 @@ class InstalledAppWorkflowTaskStopApi(InstalledAppResource):
             raise NotWorkflowAppError()
         assert current_user is not None
 
-        AppQueueManager.set_stop_flag(task_id, InvokeFrom.EXPLORE, current_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"}