CONTRIBUTING.md caught up with reality: ruff not Black, Python 3.12,
sh.voicebox.app, the routes/services/backends layout, the actual
pytest + CI story, and a working autoupdater link. SECURITY.md now
says 0.5.x and describes what CI actually enforces. The root
requirements.txt was vestigial (unpinned, included torchvision,
referenced by nothing) — deleted, with two stale doc references
repointed at backend/requirements.txt. backend/pyproject.toml is now
covered by bumpversion; its version was stuck at 0.2.3 and is synced
to 0.5.0.
Jamie Pine