once again note pydantic is never really going to work

once again note pydantic is never really going to work

In #9894 we see that pydantic's dataclass feature is doing an
end run around SQLAlchemy's collection mechanics that can't
be fixed without special steps, which we would surmise
is what SQLModel is doing here:

https://github.com/tiangolo/sqlmodel/blob/43a689d369f52b72aac60efd71111aba7d84714d/sqlmodel/main.py#L507

We don't do that, so note that we really are not supporting pydantic
directly; use SQLModel which was designed to resolve these issues.

Change-Id: I3e35e108546022c83d6c0ae73e32432cdc75d325