docs: sync from backend cdc8df1 + frontend a5dd48e + scanner 8fee27e — AMN Pay Scanner

- Activity Log: new entry for AMN Pay Scanner implementation
- Environment Variables: document AMN_SCANNER_URL, AMN_SCANNER_WEBHOOK_SECRET, AMN_SCANNER_DEFAULT
- PRD status table: mark all components implemented

PRD - Retire Request Network — In-House Payment Scanner.md

@@ -1,10 +1,23 @@
 # PRD — Retire Request Network: AMN Pay Scanner (Standalone Microservice)
 
-> Status: **Ready for implementation**
-> Task: #13 (new)
+> Status: **Implemented — 2026-05-29**
+> Task: #13
 > Priority: High
 > Effort estimate: ~4–6 days (Rust/Go scanner service + Node.js adapter swap)
 > Depends on: Task #8 (done), Task #9 (confirmation thresholds), Task #11 (Trezor sweep — parallel, not blocking)
+>
+> | Component | Status |
+> |---|---|
+> | Go scanner service | ✅ Done — `scanner/*.go`, builds, tests pass |
+> | Backend adapter (`amnPayAdapter.ts`) | ✅ Done — implements `PaymentProviderAdapter` |
+> | Webhook receiver (`amnScannerWebhookRoutes.ts`) | ✅ Done — HMAC verify + PaymentCoordinator delegation |
+> | Provider config (`providerConfig.ts`) | ✅ Done — `amn.scanner` enabled when `AMN_SCANNER_URL` set |
+> | Admin scanner status proxy | ✅ Done — `GET /api/admin/scanner/status` |
+> | Frontend lag column | ✅ Done — color-coded chips in networks list |
+> | Docker compose (dev + prod) | ✅ Done — `amn-scanner` service with healthcheck |
+> | Env vars (backend + scanner) | ✅ Done — `AMN_SCANNER_URL`, `AMN_SCANNER_WEBHOOK_SECRET`, `AMN_SCANNER_DEFAULT` |
+> | Cross-language reference test | ✅ Done — Go `computePaymentReference` = TS `computeOnChainPaymentReference` |
+> | Live end-to-end probe | ⏳ Pending — requires deployed scanner + real on-chain payment |
 
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