Retrieves a heartbeat

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

{
  "data": {
    "id": "e2b1fc39-092d-4f3c-8030-13aec3e7d0f7",
    "type": "heartbeats",
    "attributes": {
      "slug": "modi-aut-dolores-sit",
      "name": "Modi aut dolores sit.",
      "description": "Quidem optio cum quae.",
      "alert_summary": "API is down",
      "alert_urgency_id": "8be1120d-a6d5-4ad9-bebe-201f8d784e8a",
      "interval": 4,
      "interval_unit": "minutes",
      "notification_target_id": "161",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/e2b1fc39-092d-4f3c-8030-13aec3e7d0f7/ping",
      "secret": "heartbeat_fa2aeb5485dee0b81d0c364e116af8ba95bf2877bf0e2ea2de2a083157e3863d",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2025-08-12T16:34:43.592-07:00",
      "created_at": "2025-08-12T16:34:43.592-07:00"
    }
  }
}