Clicking any Beatport item now opens the download modal directly instead of
going through the discovery flow (scrape → chart card → discovery modal →
Spotify/iTunes matching → download).
Releases (albums/EPs) open as album downloads with full context.
Charts/playlists (Top 100, Featured Charts, DJ Charts, Top 10) open as
playlist downloads with per-track enrichment — each track's individual
Beatport page is visited to get release name, duration, artwork, BPM, key,
genre, and label.
Key changes:
- Add get_release_metadata() and enrich_chart_tracks() to scraper
- Add /api/beatport/release-metadata and /api/beatport/enrich-tracks endpoints
- Rewrite all Beatport click handlers to open download modal directly
- Per-track enrichment with live progress overlay (one-by-one fetching)
- Split combined artist strings so folder paths use primary artist only
- Prevent Beatport IDs from being written to Spotify tag fields
- Add beatport_release_ prefix detection for album download mode
- Support enrich=false query param for frontend-driven enrichment