function drush_scheduler_entity_update in Scheduler 2.x
Call SchedulerManager entityUpdate() to add missing db fields.
File
- ./scheduler.drush.inc, line 47 
- Drush 8 commands for Scheduler.
Code
function drush_scheduler_entity_update() {
  $result = \Drupal::service('scheduler.manager')
    ->entityUpdate();
  $updated = $result ? implode(', ', $result) : t('nothing to update');
  \Drupal::messenger()
    ->addMessage(t('Scheduler entity update - @updated', [
    '@updated' => $updated,
  ]));
}