Retrieves a heartbeat

curl --request GET \
  --url https://api.rootly.com/v1/heartbeats/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "954a6e06-980e-4a8d-bc82-22909ba9f92b",
    "type": "heartbeats",
    "attributes": {
      "slug": "nisi-veritatis-nostrum-maxime",
      "name": "Nisi veritatis nostrum maxime.",
      "description": "Ab quibusdam atque dolorum.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "2512fbd2-4435-421a-9ece-5489624ba9fb",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "476",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/954a6e06-980e-4a8d-bc82-22909ba9f92b/ping",
      "secret": "heartbeat_01739fd927ee7d0afa932d13dcbada3fb013d6cae3696cf7265515268a3f1414",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-02-05T18:21:34.471-08:00",
      "created_at": "2026-02-05T18:21:34.471-08:00"
    }
  }
}