Reason should be an enumeration with only one member `resumption` currently.
Please update these part of events:
- Graph / Engine Event (GraphRunStartedEvent)
- Queue event (QueueWorkflowStartedEvent)
- SSE response event (WorkflowStartStreamResponse)
Besides, you should remove the `is_resumption` flag for `node_started` events; including:
- Queue Event (`QueueNodeStartedEvent`)
- SSE Event (`NodeStartStreamResponse`)
- Node event (`NodeRunStartedEvent`)
After finishing the changes above, adjust related tests.
You should run the affected tests and ensure they can pass. (You should use `uv run pytest` to run tests)
afdf2397f2