'Is the fix live?' becomes a single check instead of an SSH session:
- CMS: git short SHA read at startup, shown in the bottom bar (v<sha>),
served by the public GET /version endpoint, recorded in a startup audit
entry
- Website: deploy.sh exports DEPLOY_VERSION (git SHA), Dockerfile bakes it
via build ARG into the runtime env, /api/health reports it as
deployVersion, smoke test asserts a non-'unversioned' stamp
Closes MITHOME-63
