Fix order API when not found

Currently the response is:

{
    "status_code": 500,
    "error": "Internal Server Error",
    "message": "An unexpected error occurred",
    "code": "RESOURCE_NOT_FOUND",
    "request_id": "0a8f2e5b7a6a68911b6681fb44881f00"
}

When it should be a 404.