Ethan

I've ended using this to setup commands for usage within tests after our earlier discussions and with some minor refinement ```py from typing import Sequence, TypeVar, Type from unittest import...

Thinking out loud. I like the use of columns instead of strings, but just thinking it may be worth considering getting it on the table itself somehow. I figure something...

~My only comment would be possibly to consider changing `Check` to `Constraint` so it's inline with SQL + folder and a bit clearer that it happens on the database layer...

@dantownsend any updates on this? I think if you do the tests and merge conflicts we can merge / mark ready for review? I'm happy with it once checks pass

@dantownsend this PR is ready to go, just waiting on your approval & merge

My apologies for that, I am still quite keen for this @hubert-springbok. @dantownsend is also keen but is just a tad time limited at the moment to properly dive into...