verbx v0.7.5

release: ship v0.7.4 sofa mvp and 192k benchmark gate

chore(release): cut v0.7.3 alpha

chore(release): cut v0.7.2 alpha

chore: bump to v0.7.1 with benchmarks, expanded tests, and CI hardening

- Version bump: 0.7.0 → 0.7.1
- Add performance baseline (docs/benchmarks/, scripts/benchmark_render_baseline.py)
- Expand test_cli.py and test_feature_vector.py (219 total, all passing)
- Harden CI workflows (ci.yml, install-verify.yml, release.yml)
- Add PyPI publish setup guide (docs/PYPI_PUBLISH_SETUP.md)
- Update CHANGELOG, ROADMAP, README, and PUBLIC_ALPHA_NOTES for v0.7.1

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Public alpha v0.7.0

Public alpha — v0.07.0