feat(browser): ship camofox v1.17.0 in compose, verified on a real instance

- compose: camofox service on by default (internal only, volume umt-camofox,
  healthcheck, CAMOFOX_REPLICAS=0 to skip); app depends on it with
  service_started/required=false and auto-registers camofox-env from
  BROWSER_PROVIDER_URL / BROWSER_ACCESS_KEY / BROWSER_ENABLED
- docker/camofox/Dockerfile: builds upstream tag v1.17.0 (389c996); fixes the
  upstream Dockerfile (missing postinstall.js before npm ci, sh -c not
  forwarding SIGTERM so logins were never persisted on restart)
- adapter fixes from the real container: coordinate click via evaluate +
  selector, focus typing with mode=keyboard, password values redacted from
  ARIA snapshots/extract, downloads field names, 410 after browser restart
  treated as lost tab; navigate reopens a tab in the same session
- verified-capability table keyed by upstream version (1.17.0 all ten);
  other versions stay unverified; probe reports auth failures
- settings: browser providers block (create/edit/delete/probe, capability
  table); API POST/PATCH/DELETE /browser/providers, POST .../probe
- scripts/browser-verify: umtbr stack + mock NexusPHP run of REQ 4.7.4 items
- docs: runbook browser §1/§7 (real-instance record), deploy §2.1

Co-Authored-By: Claude Opus 5.5 <[email protected]>

.gitignore

@@ -16,3 +16,4 @@ data/
 docker-compose.override.yml
 .env.deploy
 .local/
+.browser-verify-out/