release(v4.4.2): bump framework and eight skills to 4.4.2 in lockstep

PATCH release for the fix/issue-9-14 branch (Issue #9 herdr server env
isolation, Issue #14 accepted-prompt delivery confirmation). No code logic
changes.

- lib.sh MAM_VERSION, lib_py/loop/eager.py FRAMEWORK_VERSION and the eight
  SKILL.md frontmatters (create, stop, resume, status, monitor, delegate-job,
  loop, orc-onboard) move from 4.4.1 to 4.4.2
- VERSIONS.md: current release v4.4.2 (2026-09-12 KST), the eight-row skill
  matrix, and a v4.4.2 changelog section in the v4.4.1 format covering the
  server env marker denylist, MAM_NO_AUTOSTART, the shim ls "no server
  running" translation, SKS_DELIVERY_GRACE_S, MAM_INJECT_ACK_GRACE_S, the R1
  pane busy-token grace, the T1-7 trigger change and the 13 new tests
- README, README.ko, BOOTSTRAP and BOOTSTRAP.ko badges and the MESSAGING.md
  "Applies to" header follow the current version; historical 4.4.1 mentions
  (v4.4.1 changelog, IMPROVEMENTS.md ledger, docs/contracts/issue-6, reviewer
  reports) stay as history

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGpJXhSZasJLU38ksDghe

BOOTSTRAP.ko.md

@@ -2,7 +2,7 @@
 
 본 문서는 `herdr_agent_orchestration` 오케스트레이션 및 메시징 백플레인 워크플로우를 새로운 프로젝트에 도입하여 이식하고, 새로운 개발자/에이전트가 초기 가동을 시작할 때 수행해야 하는 환경 설정 및 구축 절차를 안내합니다.
 
-[![Version: v4.4.1](https://img.shields.io/badge/version-v4.4.1-blue.svg)](VERSIONS.md)
+[![Version: v4.4.2](https://img.shields.io/badge/version-v4.4.2-blue.svg)](VERSIONS.md)
 
 새로운 에이전트는 이 안내서에 기술된 절차를 순차적으로 실행하여 초기 환경을 안정적으로 설정할 수 있습니다.