Test opening a PR from a fork (CI jobs check)

Description

Run through contributing a PR from a fork to ensure CI works as expected.

Need a GitHub admin to enable this in order to test.

Here's what I see for the status checks.

I'm guessing I need an admin or someone to approve the checks.

Will revisit this after the repo is public. See #892 (comment)

Partially fixed by #1035

Example: #1042

We need to make a few more changes before we close out this ticket, specifically skip some checks that require secrets

This is fully working now with #1048.

Here's an example of a PR from an external contributor: #1025

Woohoo! Gonna close this then since it's done.