Gracefully handle HTTP 502 errors

[karlhorky]

Sometimes Notion responds with a HTTP 502 error (Bad gateway), which will throw an error and cause the export to fail completely:

AxiosError: Request failed with status code 502

We could consider catching these and retrying.

[xming521]

I will get an error here：
Request failed with status code 504

[karlhorky]

@xming521 yes, I'm seeing these since a few days now too!

Since this is not an HTTP 502 error, this is offtopic for this issue though - could you open a new issue for this (include sanitized logs if possible)?

Edit: looks like another user opened an issue over here:

• Notion API request fails with HTTP 504 Gateway Timeout #311