Adds /api/status to the landing Pages worker, HEAD-probing demo.snapotter.com and
docs.snapotter.com with a 2 second per-attempt deadline and one retry. snapotter.com is
not probed; the worker answering the request is the proof it is up.
The footer badge ships grey in the static HTML and only upgrades once the route answers.
A rejected fetch, a non-ok response, an unparseable body, and an unrecognized verdict all
leave it grey, so it never claims green on its own.
Color lives in the dot, never the label: `--color-success` scores 4.498:1 against the
footer's `--color-background-alt`, just under AA.
Four labels across 21 locales.
