{
  "sent_alerts": {
    "temperature_low:2026-02-06": {
      "dedup_key": "temperature_low:2026-02-06",
      "alert_type": "temperature_low",
      "sent_at": "2026-02-06T00:01:03.874920",
      "forecast_hour": "2026-02-06-01"
    }
  },
  "last_updated": "2026-02-07T04:01:04.044340",
  "previous_alert_snapshots": {},
  "last_ai_summary_sent": null
}