message: store global model id in redis
diff: @@ -74,6 +74,15 @@ impl Phase for PhaseState<Unmask> {
  .upload_global_model(&key, &global_model)
  .await
  .map_err(PhaseStateError::SaveGlobalModel)?;
  + let _ = self
  + .shared
  + .io
  + .redis
  + .connection()
  + .await
  + .set_latest_global_model_id(&key)
  + .await
  + .map_err(|err| warn!("failed to update latest global model id: {}", err));
  }
  info!("broadcasting the new global model");
  