message: daemon: improve cron failure error message
diff: @@ -238,7 +238,7 @@ where
  .spawn(move || loop {
  thread::sleep(interval);
  if let Err(err) = exec() {
  - error!("failed to run cron '{}': {:?}", name, err);
  + error!("failed to run scheduled task '{}': {:?}", name, err);
  }
  })?;
  Ok(())
  