release(v4.7.0): bump framework and eight skills to 4.7.0 in lockstep; archive PR #29 reviews

Issue #21 items 4, 5, 7 (worktree helpers, review identity, acceptance
A1-A8), #20 test isolation, #27 .gitignore managed block, #28 host
portability. VERSIONS.md carries the entry; the eight review reports of
PR #29 (two rounds plus the codex re-review) are archived under
.agents/reports/<session>/.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff

.agents/skills/multi-agent-mux-status/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: multi-agent-mux-status
 description: "Read-only instant snapshot of all agent herdr sessions — name, YAML status, herdr alive, pane cmd/cwd, resume UUID on disk, and any drift. No mutation. Reuses reconcile.sh --dry-run for the diff logic. Use when you want to know 'what's running RIGHT NOW' without spinning up the monitor loop."
-version: 4.6.0
+version: 4.7.0
 author: godopu
 license: MIT
 platforms: [linux, macos]