* Rough draft of issue system
* Simplify design
* Remove stale files from merge conflicts
* STI for issues
* Cleanup
* Improve Synth api key flow
* Stub api key for test
* Add sync model
* Fresh fixtures for sync tests
* Sync tests overhaul
* Fix entry tests
* Complete remaining model test updates
* Update system tests
* Update demo data task
* Add system tests back to PR checks
* More simplifications, add empty family to fixtures for easier testing