Add possibly missing headers #409

As observed in #317 with some change, we got an error about missing headers: https://github.com/Algebraic-Programming/ALP/actions/runs/19696257418/job/56421790501
This means that some headers should be added (for example #include <cstdint> in files using uintptr_t)

Surely there are other instances of such cases that can be added to the issue