MPS-20 + MPS-21: docs — auction-house.md, make-offer.md, architecture index
- docs/auction-house.md: MPS-20 reference — state machine, models,
bidding logic (validate_bid, soft-close, proxy resolution),
buy-now flow, tick scheduling, routes, cart integration, live UI,
email notifications, test summary
- docs/make-offer.md: MPS-21 reference — state machine, models,
shop settings, lib/offer pure validators + orchestrators, tick,
routes, cart integration, email notifications, test summary
- docs/architecture.md: MPS-20 + MPS-21 marked Complete in ticket
index; new docs added to Related Docs table
- CLAUDE.md: new "Auction & Make-an-Offer" section listing tables,
cart integration, cron scripts, form sections, route registration
rules, and pointers to the per-feature docs
Total: 943 tests pass (no code change in this commit).