v3.9.1
release: v3.9.1 — benchmarks, bug fixes, PyPI publish 4-regime Brunel scaling benchmark (SR/SI/AI/AR), SC network benchmark (70-155x Rust speedup), sparse CUDA (1.93x at N=20K), Brian2 Poisson fix, JOSS paper with measured Criterion numbers. Co-Authored-By: Arcane Sapience <protoscience@anulum.li>