{
  "ok": true,
  "lab": "V2LAB-0.2.1-cv2if1-partial",
  "routes": {
    "GET /health": "liveness + isolation contract",
    "GET /v2/status": "ledger stats, constants echo, score histogram",
    "POST /v2/backfill?hours=48&batch=25": "score un-scored signals (operator Bearer; bounded; idempotent)",
    "GET /v2/calibration": "champion (legacy) vs challenger (v2) band tables + rank corr vs live outcomes"
  }
}