Set cache_ok flag to true for UUIDList

[cicdw]

Closes #17231

This PR sets the cache_ok flag to True for our custom UUIDList type in the sqlalchemy layer of the server. From the SA docs:

If the TypeDecorator is not guaranteed to produce the same bind/result behavior and SQL generation every time, this flag should be set to False; otherwise if the class produces the same behavior each time, it may be set to True. See TypeDecorator.cache_ok for further notes on how this works.

I'm still reading a little bit but this class should be fully deterministic, including preserving the order in which values are given, so this should be a strict improvement AFAIK.

[codspeed-hq]

CodSpeed Performance Report

Merging #17232 will not alter performance

_{Comparing cache-ok (637bac9) with main (ba6d917)}

Summary

✅ 2 untouched benchmarks