- Rewrite the YAML-fallback test to assert the correct design: a
non-Lyricsfile .yaml sidecar returns as plain text and shadows
lower-priority sources (rather than falling through to .lrc).
- Add LibraryPath + relative Path split to the three subsonic tests
that read sidecar files via storage.For(), so they resolve against
the correct fixtures directory.
- Register a no-op extractor in api_suite_test.go BeforeSuite so
newLocalStorage does not fatal when storage.For is called during
sidecar-lyrics tests.