🐛 Smartlist and misc SDK-related fixes

[aaronleopold]

This PR fixes a handful of the issues brought up by testers after the smartlist UI was merged. I will tackle a few more before merge. The list of fixes is as follows:

• Fix issues with changing the name of the list
• Fix issues with the root-level joiner, in particular where changing it in the form wouldn't update it
• Fix emailer query which broke UI from invalid URL in SDK
• Fix /version and /check-for-update URLs in SDK

I've also updated the prisma cache key in CI so local builds and docker don't clash

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
core/src/db/filter/smart_filter.rs	80.41% <ø> (ø)