message: Create a tempfile for sending queue dumps
diff: @@ -224,7 +224,9 @@ impl Session {
  }
  }
  }
  - Action::DumpQueues => match self.create_temp_file_serializer(todo!()) {
  + Action::DumpQueues => {
  + match tempfile::tempfile() {
  + Ok(tmp) => match self.create_temp_file_serializer(tmp) {
  Some(serializer) => {
  self.send_outcome(writer, &Outcome::success("dumping queues"))
  .await?;
  @@ -238,6 +240,18 @@ impl Session {
  .await?;
  }
  },
  + Err(err) => {
  + self.send_outcome(
  + writer,
  + &Outcome::failed(format!(
  + "could not create a temporary file for queue dump: {}",
  + err
  + )),
  + )
  + .await?;
  + }
  + };
  + }
  };
  }
  Err(err) => {
  