nightly-4b9cff3e-ls250

CI Report:

https://ci-tests.linuxserver.io/linuxserver/beets/nightly-4b9cff3e-ls250/index.html

LinuxServer Changes:

No changes

Remote Changes:

Fixups after utils move (#6446)

Key changes

• get_model_changes signature tightened: The old parameter is no
  longer optional — callers must pass an explicit model. The
  None-fallback logic (old or new.get_fresh_from_db()) is pushed up to
  show_model_changes, which is the appropriate place for that default
  behaviour.
• Changelog updated: Plugin developers are notified to update their
  imports.