feat(buylist): wishlist scarcity ranking via DealGod /api/supply
DealGod shipped POST /api/supply (store_count + discogs_seller_count per release). RecordGod half:
PRICEGOD scrapes the RareWaves wishlist (www.rarewaves.com/pages/wishlist) → /products/<ean>- barcodes +
colour-from-slug → POST /admin/wishlist/scarcity → resolve barcodes → batch DealGod /api/supply → upsert
buylist (store_count/au_copies/lowest_au/discogs_seller_count/discogs_lowest + already_stocked). New 🎯 Buy
list admin view ranks rarest-first (store_count asc, sellers asc), flags colour vinyl + already-stocked.
Endpoints /admin/{wishlist/scarcity, buylist, buylist/clear}; _dealgod_supply batches ≤200. Verified e2e on
6 real wishlist items: ranked 0-store rarest first, AU prices live, sellers backfill per DealGod's pin sweep.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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