Lean MV3 extension + standalone single-file ingest server that pulls watched
sellers' full inventories from the Discogs API into discogs_full (mp_* schema),
tracking price changes and sales over time. Successor to pliceclogs/marketwatcher;
runs alongside the legacy plice server on a separate port (5057).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
