release(v4.7.1): bump framework and eight skills to 4.7.1 in lockstep; archive PR #32 merge-side reviews

Issue #25: a promoted plan is reused only with --plan-file; the implicit
newest-plan load is gone in both runners, and an empty planner report no
longer passes silently. VERSIONS.md carries the entry; the four merge-side
review reports and their identity sidecars (base 6fc9194 -> head 1e82651,
evidence review-tree) 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/reports/planner-reviewer-codex-01/report-08808795.identity.json

@@ -0,0 +1,14 @@
+{
+  "loop_id": "loop-20260921T150212Z-97d845",
+  "base_sha": "6fc9194f896eb2e13e123b8ebe7a9089b629764d",
+  "head_sha": "1e826515cc2a07ea1f8da0ff1259e1ea4dde86fd",
+  "tree_sha": "4fd82ad1c2682d12c3f5114818f97291af28a032",
+  "review_commit": "1e826515cc2a07ea1f8da0ff1259e1ea4dde86fd",
+  "reviewer": "planner-reviewer-codex-01",
+  "job_id": "08808795",
+  "verdict": "PASS",
+  "transport": "herdr",
+  "evidence": "review-tree",
+  "isolation": "worktree",
+  "verified_at": "2026-09-21T15:25:44Z"
+}