Fix schema errors and make the schema validatable

will try to provide an initial MR

not sure if those changes are reasonable and enough in scope and or valid but at least the errors are fixed and the config inspector lists the schema as 100% validatable now.

This is great, thank you so much @rkoller for contributing this. I left a couple of comments, not sure how one of them can and should be addressed, though.

As I was working with schema validation for ECA recently, I came across the approach to writing a constraint validator in code which will be able to dynamically determine the list of allowed choices. I'll rebase the MR and have a look if I can get this implemented.

This seems to work. And all tests are green too.

@rkoller do you want to test this with config inspector? You would have to use Drupal 11.2, i.e. the latest 11.x

@rkoller never mind, I just had a couple of minutes and ran it through config inspector. It's all green now. Thank you so much for your contribution, this is great.

Automatically closed - issue fixed for 2 weeks with no activity.