feeds cctp attestation latency derived

{
  "input": {
    "body": {
      "path": "fast",
      "chain": "base"
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "_note": "Excerpt of a real answer (live service, 2026-08-25, post FD HIGH-2 clamp fix); hash/signature elided, other buckets trimmed. Every figure is a BOUNDED observation (burn -> first poll seeing complete), never an exact measurement — min_s is floored at 0 (a bounded observation cannot precede the burn it bounds; an earlier example briefly shipped an unclamped negative value from L2-clock-skew artifacts, fixed 2026-08-25). Percentiles are withheld below an 8-measured-sample floor. Fast and Standard are separate settlement paths and are never blended into one percentile. The embedded EIP-712 receipt (domain chainId 421614 = Arbitrum Sepolia, a frozen signing namespace, not a settlement rail) proves who signed these exact bytes — not that the measured latency will hold for your own transfer.",
      "answer": {
        "query": {
          "path": "fast",
          "chain": "base"
        },
        "ruleset": "cctp-lat-v1",
        "coverage": {
          "status": "observed"
        },
        "distributions": {
          "base/fast": {
            "max_s": 7999,
            "min_s": 0,
            "p50_s": 1753,
            "p95_s": 7265,
            "p99_s": 7583,
            "samples": 27753,
            "measured_samples": 37,
            "percentiles_reported": true,
            "percentiles_withheld_because": null
          }
        },
        "observation_count": 27753
      },
      "attestation": {
        "domain": {
          "name": "BYTE Library",
          "chainId": 421614,
          "version": "1"
        },
        "signer": "0x…",
        "signature": "0x…",
        "payloadHash": "0x…"
      }
    }
  }
}