{
  "title": "Attestor Latency & Errors",
  "time": { "from": "now-24h", "to": "now" },
  "panels": [
    {
      "type": "timeseries",
      "title": "Signing latency p50/p95",
      "targets": [
        { "expr": "histogram_quantile(0.5, sum(rate(attestor_sign_duration_seconds_bucket[5m])) by (le))", "legendFormat": "p50" },
        { "expr": "histogram_quantile(0.95, sum(rate(attestor_sign_duration_seconds_bucket[5m])) by (le))", "legendFormat": "p95" }
      ]
    },
    {
      "type": "timeseries",
      "title": "Verification latency p50/p95",
      "targets": [
        { "expr": "histogram_quantile(0.5, sum(rate(attestor_verify_duration_seconds_bucket[5m])) by (le))", "legendFormat": "p50" },
        { "expr": "histogram_quantile(0.95, sum(rate(attestor_verify_duration_seconds_bucket[5m])) by (le))", "legendFormat": "p95" }
      ]
    },
    {
      "type": "timeseries",
      "title": "Verification failure rate",
      "targets": [
        { "expr": "rate(attestor_verify_failures_total[5m]) / rate(attestor_verify_requests_total[5m])", "legendFormat": "failure rate" }
      ]
    },
    {
      "type": "stat",
      "title": "Key age (days)",
      "targets": [
        { "expr": "(time() - attestor_key_last_rotated_seconds) / 86400" }
      ]
    }
  ],
  "schemaVersion": 39,
  "version": 1
}