- fix `make help` printing "Makefile" instead of target names — caused by
`include tools.versions` adding to MAKEFILE_LIST; grep now targets Makefile directly
- `make release` now creates annotated tags: pre-populates the message
with commits since the previous tag and opens $EDITOR for review
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>