Dynamic queries do not respect decoders of embedded classes

[lpld]

It looks like #2607 breaks SQL generation in dynamic queries, because now dynamic queries ignore any decoders defined for embedded classes.

Version: 4.6.0
Module: quill-sql, quill-jdbc

Here is a simple example:

import io.getquill._
val ctx = new SqlMirrorContext(PostgresDialect, SnakeCase)
import ctx._

// embedded class with custom decoder
case class PersonName(firstName: String, lastName: String)
implicit val pNameDecode = MappedEncoding[String, PersonName] { PersonName(_, "Smith") }

// top-level class
case class Person(id: Long, name: PersonName)

Expected behavior

Both query[Person] and dynamicQuery[Person] generate identical SQL.

Actual behavior

println(run { query[Person] }.string)
// correct, Quill respects the decoder
// SELECT x.id, x.name FROM person x

println(run { dynamicQuery[Person] }.string)
// incorrect, Quill includes the fields of the embedded class, ignoring the defined decoder
// SELECT x.id, x.first_name AS firstName, x.last_name AS lastName FROM person x

Steps to reproduce the behavior

Scastie snippet: https://scastie.scala-lang.org/UqW82jVTQuuyNR2McIKnzA
Unfortunately, I couldn't make Scastie work with dynamic queries (some strange class loader error in runtime), so, in case it helps, here's a simple github project that shows the same issue: https://github.com/lpld/quill-embedded-bug/blob/master/src/main/scala/example/Hello.scala

Workaround

No workaround that I could find.

@getquill/maintainers