Backward-compatibility checks on CI

- Can we write a reliable CI job that checks whether the pre-commit version can still read a post-commit file? Does podio have a "write one default copy of everything" that we can use?

_Originally posted by @wdconinc in https://github.com/eic/EDM4eic/pull/90#pullrequestreview-2216392556_

Start by investigating how this repository uses podio and how its CI jobs are configured. Determine whether podio can write one default copy of everything, then define a CI check that verifies a pre-commit version can read a post-commit file; done means the compatibility check runs reliably in CI.

Written by the indexing model from the issue text.