Retrieves a heartbeat

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

{
  "data": {
    "id": "41ac874f-e624-4a42-a077-e49a7bba03b4",
    "type": "heartbeats",
    "attributes": {
      "slug": "mollitia-delectus-illum-quam",
      "name": "Mollitia delectus illum quam.",
      "description": "Qui dolore quis et.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "a5fe167b-96e4-4c54-890a-0da528825c4b",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "476",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/41ac874f-e624-4a42-a077-e49a7bba03b4/ping",
      "secret": "heartbeat_31a868356ee77a113d546193480b9ad14f67b7008248afdfe8b5f065efc7a41e",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-01-30T15:02:53.700-08:00",
      "created_at": "2026-01-30T15:02:53.700-08:00"
    }
  }
}