Handoff

Milestone 0 skeleton. Live service readiness:

{
  "status": "ok",
  "service": "api",
  "app": "Handoff",
  "version": "0.0.1",
  "uptimeMs": 110166,
  "checks": {
    "db": {
      "ok": true,
      "latencyMs": 1124
    },
    "s3": {
      "ok": true,
      "latencyMs": 834
    },
    "temporal": {
      "ok": true,
      "latencyMs": 192
    }
  }
}

{
  "status": "ok",
  "service": "broker",
  "app": "Handoff",
  "checks": {
    "redis": {
      "status": "ok",
      "latencyMs": 50
    },
    "chrome": {
      "status": "ok",
      "latencyMs": 101
    }
  },
  "time": "2026-09-10T01:35:14.898Z"
}