using cue as database schema

[aep]

so i'm working on a document database. currently i'm using jsonschema which feels familiar but has terrible performance.
its validation is also way too constrained

instead i'm now looking at cue and kcl. kcl seems to be a natural fit because you can store the compiled schema into the db.
with cue the best i could replace "schemas" with is by having a not yet concrete value exported as AST. This seems extremely inefficient? I'd have to load the AST every time someone puts a concrete document into the db.

Maybe i'm not thinking about cue right yet. maybe someone has a super genious idea how to make this fit, or maybe abusing cue like this just isnt a good idea