nightly-9110a111-ls96

CI Report:

https://ci-tests.linuxserver.io/linuxserver/beets/nightly-9110a111-ls96/index.html

LinuxServer Changes:

Pin beetcamp to 0.19.2 until upstream requirements fixed.

Remote Changes:

Stop perpetually writing mb_artistid, mb_albumartistid and albumtypes fields (#5540)

This PR fixes an issue where the beet write command repeatedly shows
differences for certain fields (mb_artistid, mb_albumartistid,
albumtype) even after writing the tags.
This happens because these fields are actually stored as lists in the
media files (mb_artistids, mb_albumartistids, albumtypes), but
beets maintains both single and list versions in its database.

This PR addresses this issue in a non-invasive way: the fix ensures
consistency between single fields and their list counterparts by:

1. When setting a single field value, making it the first element of the
   corresponding list
2. When setting a list, using its first element as the single field
   value

This resolves long-standing issues #5265, #5371, and #4715 where users
experienced persistent "differences" in these fields despite writing
tags multiple times.

Changes:

• Added ensure_consistent_list_fields() function to synchronize field
  pairs
• Applied this function during metadata application
• Added tests for all field combinations

Fixes #5265, #5371, #4715

Note: your music needs to be reimported with beet import -LI or
synchronised with beet mbsync in order to fix these fields!