It's fun to test the boundaries of github's services, but if you're doing something useful I'd just hire a vps, they can be had from $5 a month. You could still upload the sqlite file to github via a check-in.

Presumably you can bypass the artifact retention limit by uploading them as release artifacts (which are retained forever) rather than job artifacts.

(Not that I’d advocate for this in general, since ultimately you’re duplicating a bunch of data and will eventually catch the eye of some GitHub compliance script.)