Hi David, My two cents as I am just a user, but I would like to say to not worry too much about those messages. Looking here: https://piuparts.debian.org/bookworm/, you will see that:
successfully-tested [...] - but logfile contains unowned files after purge: 4511 passed [...] failed-testing [...] - due to unowned files after purge: 1 failed [...] If you look at most of the 'successfully-tested' cases and the 'failed-testing' case, you will observe the same INFO messages. This confirms that it is due to a dependency of the emacs package and not from the package it-self. Regards, Patrice