metadata should be typed as Record<string, string>

[danilofuchs]

Confirm this is a Node library issue and not an underlying OpenAI API issue

• [X] This is an issue with the Node library

Describe the bug

The generated types for metadata field is always unknown

This makes it weird to work with:

A better type would be Record<string, string>

To Reproduce

Install openai 4.61.1

Code snippets

No response

OS

linux

Node version

20

Library version

4.61.1