Patch release: update version number to 0.9.7.5.1 (missed in 0.9.7.5 release) and improve release process documentation.
- #982 CLAUDE.md: document annotated tag convention and linked issue numbers in release notes
- #983 Bump version to 0.9.7.5.1
- #985 Tag main branch as ver-0.9.7.5.1
