- Fix enrichment progress never updating: remove `continue` that skipped
progress_callback for successful tracks in enrich_chart_tracks
- Split chart/extract into two-step flow: extract raw tracks, then enrich
via polling endpoint with live progress overlay updates
- Move Beatport enrichment cache to persistent metadata cache system
- Fix metadata cache detail modal for Beatport (URL entity_ids with slashes)
- Add per-source Clear dropdown (Spotify/iTunes/Deezer/Beatport) to cache browser
- Remove debug logging from enrichment progress tracking