Replace the single 7-day full rebuild with per-tier scheduling:
- Tier 1 (sitewide top lists): weekly refresh, 12 API calls
- Tiers 2-4 (discographies): monthly refresh, incremental —
only fetches discographies for artists not already indexed
On subsequent runs:
- If T1 is fresh, load cached artists from the index (~0 calls)
- If discographies are fresh, skip Tiers 2-4 entirely (~0 calls)
- If discographies are stale, diff against indexed set and only
fetch new artists that appeared in the sitewide lists
Add helpers: isMetaFresh (per-key freshness check),
loadCachedSitewideArtists (read artists from existing index),
filterUnindexed (diff artist list against indexed set).
After first build: typical startup is <5s (T1 cache load).
Monthly incremental: ~50-100 calls for newly appeared artists.
yonlu
e4f4639ab7