Kill the summaries classes

So I give up on Arel. I tried to be nice, I tried to factor it out. It takes up > 10% of the entire codebase, and it's fragile, and it's a mess, and the abstraction leaks into the models. So I give up. I have a query now. It's a single query, and it's isolated within a single ruby file. So fuck you Arel.
Prefer `detect` over `find`.