docs(v4.8.5): archive PR #48 reviews (three rounds) and record the merge-workspace review

PR #48 already carries the 4.8.5 lockstep bump. Merge-workspace review:
round 1 (@35935f9) claude agy grok NOT PASS (test portability: tomllib on
Python 3.9, /proc and /tmp on macOS), codex no verdict (model at capacity,
budget spent); fixed in 36f0b8d and e8d9151. Round 2 (@e8d9151) codex NOT
PASS (unrunnable config check passed an unchecked merge, odd pids closed a
pane, nan dropped the user's settings); fixed in ab93776. Round 3
(@ab93776) 4/4 PASS. Full suite at ab93776 on macOS / Python 3.9: 1456
passed / 0 failed / 38 skipped. Reports and the round-3 identity sidecars
go to .agents/reports/<session>/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff

.agents/reports/planner-reviewer-codex-01/report-b8dbd280.identity.json

@@ -0,0 +1,14 @@
+{
+  "loop_id": "loop-20261005T085016Z-c0f6eb",
+  "base_sha": "e8d9151226d8139c7b5688e83d035a3a747aeb2d",
+  "head_sha": "ab93776d6d1b8ca534c14b6be53f61dc3a0fa2a9",
+  "tree_sha": "f49ffdc8e95dc316f752fd81b2d55a0efddf1a12",
+  "review_commit": "ab93776d6d1b8ca534c14b6be53f61dc3a0fa2a9",
+  "reviewer": "planner-reviewer-codex-01",
+  "job_id": "b8dbd280",
+  "verdict": "PASS",
+  "transport": "herdr",
+  "evidence": "review-tree",
+  "isolation": "worktree",
+  "verified_at": "2026-10-05T09:05:24Z"
+}