07abb101d4
The post-deploy smoke test was fetching www.cameleer.io/ directly,
which Cloudflare may serve from edge cache regardless of what rsync
just shipped — falsely greenlighting a failed deploy or red-flagging
a successful one. Append ?cb=$GITHUB_RUN_ID and Cache-Control:
no-cache to both fetches so the edge revalidates per run.
Surfaced by code review of the prior commit (4c98caab).