How to backup and restore Axios instance configuration including interceptors and defaults?

When working with Axios in a long‑running application, you may need to persist the current state of an Axios instance—such as its base URL, default headers, timeout value, and any attached request/response interceptors—so that after a restart or reload the instance behaves exactly as before. What are the recommended approaches to serialize this configuration (including interceptors) and later restore it to a newly created Axios instance while preserving validation guarantees?

Consider scenarios where you want to backup the instance before performing a batch of requests and restore it afterward, or where you need to share a pre‑configured Axios setup across multiple modules or workers. Which Axios properties are serializable, which require manual handling (e.g., interceptor functions), and how can you verify that the restored instance produces identical request outcomes?