Retrieve `request-id` header from response

[foxt]

Is your feature request related to a problem? Please describe the problem.

Hello. When you submit a request that results in a 204, sometimes you need to retrieve the request-id response header to check on the request later. From what I can see, there is no way to retrieve this in the SDK.

Describe the solution you'd like.

A parameter in the callback that gives the response headers.

Additional context?

No response