implement pause between mutations

> If you are making a large number of POST, PATCH, PUT, or DELETE requests, wait at least one second between each request. This will help you avoid secondary rate limits.

https://docs.github.com/en/rest/using-the-rest-api/best-practices-for-using-the-rest-api?apiVersion=2022-11-28#pause-between-mutative-requests

We could implement this by saving the last timestamp of a POST, PATCH, PUT, or DELETE in a global variable, then checking/delaying/updating it when making a new POST, PATCH, PUT, or DELETE request (atomically).