JobCache status API

Public, anonymous data plane for status.jobcache.corbet.ch. Every response is a public projection — no admin bindings, no operator data.

• GET /health — rolled-up status + public Health snapshot + brokerPathReference
• GET /corpus — shared-index count, freshness summary
• GET /incidents — public incident feed

Live device broker health stays on api.ops.jobcache.corbet.ch/devices as brokerPath: queued tasks, active/submitted/stale leases, observation submissions, trust state and conflicts, follow-up verify tasks, and missing object refs. Cloud services coordinate leases and committed state; they do not run fetch/chunk/embed work.

Worker version 0.1.0.