Support Rails 7.2+

[ghiculescu]

The schema_migration method was moved in rails/rails#51162

Red tests are due to #93

[ghiculescu]

@casperisfine would Rails ever consider a public API for accessing this model or table name?

[casperisfine]

would Rails ever consider a public API for accessing this model or table name?

Hum, I dunno. I was quite happy I was able to move those without breaking the public API. But I guess we could expose them on AR::Base and commit to that. But I wouldn't take this decision alone, at the very least @eileencodes would need to agree.

[eileencodes]

would Rails ever consider a public API for accessing this model or table name?

I'd be fine with schema_migration being public but not the class. When I removed the inheritance on Base it also removed the ability to do most queries, so it only responds to some methods. I don't want PRs making that class (or InternalMetadata) more robust.

[joshuay03]

Not necessarily a breaking change for 7.2 but it would be great if #102 could also get included with this.

[etagwerker]

@ghiculescu Looks good, thank you!