curl --request GET \
  --url https://api.openfiskal.com/v1/locations/{locationId}/registers/status \
  --header 'Authorization: Bearer <token>'

{
  "location_id": "<string>",
  "data": [
    {
      "register_id": "<string>",
      "status": "operational",
      "last_heartbeat_at": "2023-11-07T05:31:56Z",
      "open_operations": [
        {
          "id": "<string>",
          "type": "sale",
          "started_at": "2023-11-07T05:31:56Z"
        }
      ],
      "unsynced_operations": 123,
      "software": {
        "pos_vendor": "<string>",
        "pos_version": "<string>",
        "agent_version": "<string>"
      }
    }
  ]
}