docs: add release/version process SOP (#68)
Add docs/release-version-sop.md: operator SOP for cutting a versioned
release — master-based flow, SemVer bump decision, version-bump PR prep,
required pre-release checks, scripts/release-tag policy (safe-by-default,
master-only, clean-tree, tag-after-merge), who may merge/tag, self-review/
self-merge restrictions, status:in-progress handling, worktree cleanup, and
an explicit do-not list. Kept distinct from docs/release-workflows.md
(future release-mcp orchestrator). Link from README.
Documentation only; no code behavior changed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
sysadmin
b1cea2a189