fix(core): fix end_user_id reference and add task status tracking

- Fix write_router to use actual_end_user_id instead of end_user_id
- Add task status tracking via Redis in scheduler
- Expose task_id in memory write response
- Fix logging import path in scheduler

api/app/core/memory/agent/langgraph_graph/routing/write_router.py

@@ -94,9 +94,9 @@ async def write(
         # )
         scheduler.push_task(
             "app.core.memory.agent.write_message",
-            end_user_id,
+            actual_end_user_id,
             {
-                "end_user_id": end_user_id,
+                "end_user_id": actual_end_user_id,
                 "message": structured_messages,
                 "config_id": str(actual_config_id),
                 "storage_type": storage_type,