Pydantic2 has been released in june 2023 and it is a massive change compared to v1. There is even a whole migration guide at:
https://docs.pydantic.dev/2.0/migration/

Needless to say, larray is not compatible with it. We should either rewrite Checked* using v2, or stop using Pydantic at all (I have some proof of concept code doing this somewhere).

PS: CI is not failing on this (yet) because anaconda packages for Pydantic are still at v1. But I noticed the error via readthedocs where pydantic is installed via pip instead.