feat(carwash): review outbox, booth side — plate-blurred vehicle crop + the operator's choice, queued for a trusted remote reviewer

The operator's category choice is a hypothesis, not truth (user, 2026-09-06): each wash
order with a vehicle read queues a package for a trusted reviewer over the private overlay
(Netbird); the verdict becomes the phase-B training label and the per-operator error rate.
wiki/concepts/vision-review-outbox.md.

- Boxes: the vision service returns the vehicle bbox; snapshot.ts stores the vehicle and
  plate boxes on the read as FRACTIONS of the analysed frame (the stored snapshot is a
  downscaled copy); vehicleForIdentity() returns them.
- carwash_review_outbox (migration 0031) + review-outbox.ts: crop = detector box + 8 %
  margin, ≤ 640 px, plate blurred in place from the plate box; payload carries a
  pseudonymous booth id and a keyed operator hash — no site name, no plate, no OSD, no
  bystanders; multipart POST with a per-booth bearer; 2xx → sent (image dropped);
  400/404/413/415/422 → abandoned; anything else → backoff 1 min·2^n capped 6 h; voided
  orders and items older than 14 days abandoned unsent. Nothing queued while unconfigured.
- Enqueue is fire-and-forget off the intake path in createOrder; the loop runs every
  CARWASH_REVIEW_INTERVAL_SEC (60) and stops on close.
- GET /api/carwash/review/status (site:read) + a "Remote review" line in Setup → Car wash.
- Env CARWASH_REVIEW_URL / _TOKEN / _BOOTH_ID (all three or off) documented in
  .env.example and forwarded by compose.
- Tests: review-outbox.test.ts (crop + blur on a synthetic frame, config/pseudonyms,
  queue/drain/backoff/abandon, through the app). Wiki: new concept page, index,
  venue-modules As built, log. The collector is not built.

Claude-Session: https://claude.ai/code/session_01FWncR69HgGPuei1dLrW3cU

wiki/index.md

@@ -57,6 +57,7 @@ Counts: 4 sources · 19 entities · 47 concepts · 8 decision records.
 - [[append-only-event-chain]] — append-only + hash chain + signing = unforgeable log (signing is **software today**; hardware signer pending — see below).
 - [[hardware-signer-options]] — where the ledger signing key should live (TPM interim → USB-HSM target; ATECC608 upcoming, not on-site) so a host-owner can't forge the chain.
 - [[reconciliation]] — the real anti-fraud control; what remote sync actually is.
+- [[vision-review-outbox]] — the wash operator's category choice is a hypothesis: the booth queues a plate-blurred vehicle crop + the choice for a trusted remote reviewer over Netbird (one-way, offline-first, no site identity leaves); the verdict = training label + per-operator error/fraud rate.
 - [[disk-os-hardening]] — the *why* of host hardening: LUKS FDE + TPM-sealed auto-unlock (PCR 7) + Secure Boot + GRUB edit-lock + unprivileged operator + firmware/dbx lockdown; secondary control (reconciliation is the main event). Commands → [[appliance-provisioning]].
 - [[backup-recovery]] — admin-driven encrypted full-DB backup (local/SMB/SFTP) + DR; signing key escrowed & decoupled from TPM so the ledger survives total hardware loss; restore is admin-only; last-success/error status + schedule are now restart-durable (migration 0025, fixed a "shows Never despite valid backups" bug).