fix: pass DagStatusData model instead of dict to append_event_and_broadcast

add_event() calls .model_dump() on data, so it needs a Pydantic model not a dict.

server/reflector/hatchet/dag_progress.py

@@ -216,7 +216,7 @@ async def broadcast_dag_status(transcript_id: str, workflow_run_id: str) -> None
                     transcript_id,
                     transcript,
                     "DAG_STATUS",
-                    dag_status.model_dump(mode="json"),
+                    dag_status,
                     logger,
                 )
     except Exception: