Admin UI host on cPanel via release-only static deploy

We need a maintainer dogfood path and adopter runbook for the admin UI while keeping it outside the Hub runtime. The UI is a cross-origin static SPA at rbac.mnfprofile.com (cPanel Apache/LiteSpeed), built with VITE_API_BASE_URL pointing at https://rbac-api.mnfprofile.com/api/v1, deployed by a separate GitHub Actions workflow on v* tags plus workflow_dispatch (not on every main push), with distinctly named jobs for build, upload, and smoke. Vercel/Pages and the Hub fastapi-rbac-frontend nginx image remain secondary adopter options; Node-on-cPanel was rejected for dogfood because production Vite output is static files.