Thank you very much.
I am aware of the execution_queue as it is configured in the official GitHub examples. However, even in the official GitHub examples, the process remains in a pending state and won't proceed unless the service queue is started.
None
pipe.set_default_execution_queue("default")

Thank you for providing the URL link.
Wouldn't this mean that the service queue is actually mandatory? Also, I would like to learn about the controller rather than the decorator.