Update src/events.py

src/events.py

@@ -52,7 +52,7 @@ async def publish_task_event(event_type: str, task: Task):
     event = {
         "event_id": str(uuid.uuid4()),
         "event_type": event_type,
-        "timestamp": datetime.utcnow().isoformat() + "Z",
+        "timestamp": datetime.now(datetime.UTC).isoformat() + "Z",
         "user_id": str(user_id),  # Convert to string for consistency
         "task_id": getattr(task, 'id', 0),  # Assuming id exists on task
         "task_data": {