Can ActiveModel::Normalizations work with our model classes?

[jrochkind]

ActiveModel now has normalization, in a future Rails release. (8.1?)

What do we need to do to make it work with our model classes? Major or minor refactoring? Needs to be investigated.

rails/rails#53887

See also #222 , if we get ALL those things, significant refactoring or consideration is indicated.