- Add deprecation headers to GUI_V6.py and GUI_V6_Demo.py
- Mark V6 as deprecated in GUI_versions.txt
- Update README.md: replace V6 GIF reference with V65 PNG
- Add FT2232H production notice banner to docs/index.html
Resolve all 374 ruff errors across 36 Python files (E501, E702, E722,
E741, F821, F841, invalid-syntax) bringing `ruff check .` to zero
errors repo-wide with line-length=100.
Rewrite CI workflow to use uv for dependency management, whole-repo
`ruff check .`, py_compile syntax gate, and merged python-tests job.
Add pyproject.toml with ruff config and uv dependency groups.
CI structure proposed by hcm444.