nightly-9a7a0b93-ls250

CI Report:

https://ci-tests.linuxserver.io/linuxserver/beets/nightly-9a7a0b93-ls250/index.html

LinuxServer Changes:

No changes

Remote Changes:

Rename play_count -> lastfm_play_count in lastimport due to clash with mpdstats (#6443)

lastimport: Rename play_count field to lastfm_play_count

Renames the flexible field written by the lastimport plugin from
play_count to lastfm_play_count to avoid a silent collision with the
same-named field written by the mpdstats plugin.

Impact

• Breaking change: existing databases with play_count populated by
  lastimport must be migrated manually — automatic migration is not
  possible due to the field name clash. Users are instructed to run beet modify lastfm_play_count='$play_count'.