Change from ActiveRecord to another system

[Floppy]

Sequel looks like a good AR alternative, and https://github.com/TalentBox/sequel-rails should help us manage a transition.

Potential problems: scoped_search, devise

[Floppy]

Hanami 2.2 is using ROM, so that might be a better approach.

[Floppy]

https://rom-rb.org/4.0/learn/introduction/active-record/