### Summary of Changes
- **Version Metadata Generation**:
- `ci/docker/www/Dockerfile` & `ci/docker/docs/Dockerfile` accept
`COMMIT_SHA` and `VERSION` build args and write
`/usr/share/nginx/html/version.json`.
- `ci/config/nginx/default.conf` configures `location = /version.json`
with `Cache-Control: no-store, no-cache, must-revalidate` so
verification is never stale.
- **Automated Rollout Verification**:
- `.github/workflows/services-www-releases-dispatch-release.yml`
- `.github/workflows/services-docs-next-required.yml`
- `.github/workflows/services-www-next-required.yml`
- Added `verify-rollout` job that polls
`https://www.ermnvldmr.com/version.json` and
`https://docs.ermnvldmr.com/version.json` with 10s intervals (up to 5
minutes) to ensure the commit actively rolls out to users.
deytenit
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