This is simply a funny "this is the current state, I like Star Wars" message in the python uWSGI code. See:

https://uwsgi-docs.readthedocs.io/en/latest/Emperor.html

"As soon as a vassal manages a request it will became “loyal”. This status is used by the Emperor to identify bad-behaving vassals and punish them."

So if a new request comes it, it is given to a child (a vassal). If the "vassal" signals it has accepted the request, the process manager designates the status of the child (vassal) as "loyal".

This has nothing to do with Perl, but everything with the Python uWSGI implementation.