nightly-cef180ea-ls341

CI Report:

https://ci-tests.linuxserver.io/linuxserver/beets/nightly-cef180ea-ls341/index.html

LinuxServer Changes:

Full Changelog: nightly-63b69fa9-ls340...nightly-cef180ea-ls341

Remote Changes:

importer: fix tar and 7z archive import (#6696)

• Fixes #5664. Both tar and 7z archive imports were broken because
  ArchiveImportTask.extract calls archive.infolist(), but neither
  tarfile.TarFile (lost ZipFileCompat in Python 3) nor
  py7zr.SevenZipFile (exposes list() instead) provides it. Both
  surfaces produced '… object has no attribute 'infolist' and aborted
  the import.
• Adds thin module-level wrappers — TarArchive (subclass of
  tarfile.TarFile) and SevenZipArchive (composition over
  py7zr.SevenZipFile, since py7zr is optional) — that expose a
  ZipFile-compatible infolist(). Tiny _TarMemberInfo /
  _SevenZipMemberInfo adapters carry only the two attributes the extract
  loop reads: filename and date_time.
• Fixes a latent bug in the test suite: ImportTarTest.create_archive
  and Import7zTest's inheritance were dead code. The parent
  test_import_zip called the module-level create_archive(self) helper,
  which only knows how to build zips, so both tar and 7z tests were
  silently exercising the zip path. Routing through
  self.create_archive() makes them real regression tests for this bug.

This supersedes #5666; design follows @wisp3rwind's review feedback
there (module-level wrappers, minimal adapters, shared test
infrastructure via self.create_archive).