repair_worker had TWO _fix_quality_upgrade methods; the legacy one (expecting
expected_title/_fix_action) shadowed the new findings-based one (matched_track_
data), so applying a Quality Upgrade finding failed live with "No title/artist".
The "remove dead functions" refactor missed it. Merge into a single handler:
matched_track_data -> wishlist (safe pattern, no auto-delete on redownload) plus
_fix_action='delete' -> remove file + row. Also drops the duplicate dispatch key.
test_quality_upgrade: the pure-decision tests called deleted helpers
(meets_preferred_quality / classify_track_quality / preferred_quality_floor /
RANK_*). Rewire them to the shared v3 API (targets_from_profile +
quality_meets_profile); drop the few that only pinned deleted internals; update
the scan stubs for the new resolve_library_file_path/_read_file_ids signatures.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>