PTQ unit test

Summary

This Merge Request introduces a comprehensive suite of unit tests aimed at validating the core components of the PTQ (Post-Training Quantization) workflow. These tests ensure that the individual building blocks behave as expected under various conditions.

In addition, the functional tests have been improved to include bitwise verification using checksums. This enhancement guarantees that the small-scale test architectures execute in a strictly deterministic manner, ensuring byte-level consistency across runs.