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

.agents/skills/multi-agent-mux-monitor/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: multi-agent-mux-monitor
 description: "Run a long-lived reconciler that watches .mam/agent-sessions.yaml against the actual herdr/agent runtime state and reconciles them. Use when you want live visibility into which agent sessions are running, which are dead, which have stale YAML entries, and which have new session ids that haven't been recorded yet. Runs as a persistent loop (`reconcile.sh --subscribe`) that keeps going until it times out, idles out, or is interrupted."
-version: 4.4.1
+version: 4.4.2
 author: godopu
 license: MIT
 platforms: [linux, macos]