docs: def manager_post_save_handler(sender, instance, created, **kwargs):
      """Run newly created (spawned) processes."""
      if instance.status == Data.STATUS_DONE or instance.status == Data.STATUS_ERROR or created:
          # Run manager at the end of the potential transaction. Otherwise
          # tasks are send to workers before transaction ends and therefore
          # workers cannot access objects created inside transaction.
          transaction.on_commit(lambda: commit_signal(instance.id))