Atoll centralised auth service prod. Backend: atoll-api-prod :8452 (Python aiohttp, RS256 JWT auth, user prefs, service tokens, user API tokens, intra-app service roles, shute WebSocket event bus). Frontend: atoll_ui_prod :5183 (Python static file server serving React SPA from ~/prod/atoll/frontend/dist/). HTTPS via ironclad caddy-lan at https://atoll-prod.internal. Managed by Vivo Release Manager.