PhAST v0.16.2 arXiv release

Release snapshot for arXiv:2606.23458.

Paper: https://arxiv.org/abs/2606.23458

Code: https://github.com/CEMS-Lab/PhAST

Docs: https://cems-lab.github.io/PhAST/

This release records the public PhAST repository state associated with the live arXiv manuscript. It includes updated repository citation metadata, README citation guidance, and public citing documentation.