doc: add debugging steps in api/README.md

api/README.md

@@ -74,7 +74,12 @@
 10. If you need to handle and debug the async tasks (e.g. dataset importing and documents indexing), please start the worker service.
 
    ```bash
-   uv run celery -A app.celery worker -P gevent -c 1 --loglevel INFO -Q dataset,generation,mail,ops_trace,app_deletion
+   uv run celery -A app.celery worker -P gevent -c 1 --loglevel INFO -Q dataset,generation,mail,ops_trace,app_deletion,plugin
+   ```
+
+   Addition, if you want to debug the celery scheduled tasks, you can use the following command in another terminal:
+   ```bash
+   uv run celery -A app.celery beat 
    ```
 
 ## Testing