{
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  "timestamp": "2026-04-14T20:06:16.345373+00:00",
  "source_trajectory_ids": [
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    "avg_reward": 1.032,
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    "avg_latency_ms": 42.0
  },
  "challenger_metrics": {
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  },
  "promotion_decision": {
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    "reasons": [],
    "metrics": {
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  },
  "promoted_version_id": "20260414-200616",
  "baseline_version_id": "v-baseline",
  "dry_run": false
}