auto-round

f986348f - fix(rrq): resolve ruff F821 + RUF013 pre-commit failures

fix(rrq): resolve ruff F821 + RUF013 pre-commit failures - quantizer.py: import logger (was used but never imported) - export_to_rrq.py, rrq_linear.py: convert implicit Optional annotations (T = None) to explicit T | None per PEP 484 (RUF013)