curl --request GET \
  --url http://localhost:8080/cabinet/admin/remnawave/status

{
  "is_configured": true,
  "configuration_error": "<string>",
  "connection": {
    "status": "<string>",
    "message": "<string>",
    "api_url": "<string>",
    "status_code": 123,
    "system_info": {}
  }
}