{
  "event": "execution.failed",
  "execution_id": "exec_...",
  "schema_id": "sch_...",
  "provider": "anthropic",
  "model": "claude-sonnet-4-20250514",
  "attempts": 3,
  "latency_ms": 4521,
  "status": "FAILED",
  "timestamp": "2026-05-17T12:00:00Z"
}