release(v4.9.2): README rewritten against the code, README.ko.md in step - archive the review reports and bump the lockstep version

Review loop (--review-only, --all-reviewer, fact-checked against the
code): rounds 1-3 NOT PASS with factual corrections, round 4 (@62da805)
4/4 PASS. Documentation only.

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

.agents/skills/multi-agent-mux-orc-onboard/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: multi-agent-mux-orc-onboard
 description: "Register current or specified orchestrator session UUID into agent-sessions.yaml orchestrator_uuids list to prevent sub-agent discovery capture."
-version: 4.9.1
+version: 4.9.2
 author: godopu
 license: MIT
 platforms: [linux, macos]