(postponed, requires upstream fix) add support for UUID

[choucavalier]

By default pydantic's UUID fields are serialized as UUID objects by model_dump

This does not work well with pyarrow, which does not support UUID objects but instead a byte representation of them (which can be obtained with my_uuid.bytes).

In the tests, I've added annotated the types with serializers to convert the UUID objects as bytes.

Not sure this is the way to go, though

[simw]

Thanks for looking at this and submitting a PR!

The underlying issue looks to be related to apache/arrow#43855. Once that is done (and your PR merged here), the conversion should happen seemlessly without the extra serializer. But for now, the serializer is needed.

I'll look at getting the checks to pass and also adding it to the documentation, in order to get this merged soon.

[choucavalier]

Thanks! Yes we have to wait for that to be fixed. Right now I had to serialize the UUID as bytes which actually does not work. Let's wait for this to be fixed upstream.

[simw]

I think this works now? I've updated the code and tests slightly, mainly to add checks for the pyarrow version (as uuid only comes in pyarrow 18.0 and above). Yes, the serializer workaround is a little awkward, but it works (as far as i can tell) and this library won't have to change if / when the fix in pyarrow is released.

Let me know if you disagree. If not, I'll move ahead, merge and release it.