The boot provisioning pass (orgs, repos, teams, CI-runner token) all hits
the Forgejo API, but ensure_all only checked the container is *present*,
not that its HTTP is *listening*. A nixos-rebuild that restarts hive-forge
and hive-c0re together races: every ensure_* fired at a refused socket and
left a stale 'provisioning failed' banner that never cleared, since the
pass is one-shot. Poll GET /api/v1/version (unauthenticated) until it
answers, bounded at 1 minute, before provisioning; on timeout proceed
anyway so a genuinely-down forge still surfaces its real errors. Mirrors
the readiness-retry the gateway-nginx path already has.