Retrieves a heartbeat

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

{
  "data": {
    "id": "9802dbf0-d0d5-4cd3-8935-db5c1eb3fc77",
    "type": "heartbeats",
    "attributes": {
      "slug": "ut-et-explicabo-occaecati",
      "name": "Ut et explicabo occaecati.",
      "description": "Fugiat quia officia repudiandae.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "53595d6e-d32f-44db-933d-75b69994995c",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "226",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/9802dbf0-d0d5-4cd3-8935-db5c1eb3fc77/ping",
      "secret": "heartbeat_b0d5c9d97f8414f476ee7f66a8c4254a45ab8028b6ac2ce64d6a31b587466b9b",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-01-06T20:03:29.437-08:00",
      "created_at": "2026-01-06T20:03:29.437-08:00"
    }
  }
}