release(v4.9.3): u1e no longer writes the checkout's .mam/shim/herdr - archive the review reports and bump the lockstep version

Review loop (--review-only, --all-reviewer): round 1 (@3a30d7d) 4/4 PASS;
each reviewer reproduced W1 failing on the pre-fix tree. Seven #50/#55 and
leak modules (112 tests) from a clean worktree left no .mam in the
checkout.

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

BOOTSTRAP.md

@@ -2,7 +2,7 @@
 
 This document guides you through the setup and initialization procedures required to adopt the `herdr_agent_orchestration` orchestration and messaging backplane workflow in a new project, enabling a new developer or agent to get up and running quickly.
 
-[![Version: v4.9.2](https://img.shields.io/badge/version-v4.9.2-blue.svg)](VERSIONS.md)
+[![Version: v4.9.3](https://img.shields.io/badge/version-v4.9.3-blue.svg)](VERSIONS.md)
 
 A new agent can follow the steps in this guide sequentially to establish a stable and reliable initial environment.