Custom schema names aren't respected

[mdiep]

PersistDB doesn't always respect it if you specify a custom name for the schema:

struct Foo {
  var id: Int
}

extension Foo: PersistDB.Model {
  static let schema = Schema<Foo>(
    Foo.init ~ "Bar" // schema is named "Bar" here
    \.id ~ "id"
  )
}

Specifically seems to be a problem with queries.