release(v4.4.4): bump framework and eight skills to 4.4.4 in lockstep

PATCH release for the fix/issue-12-8-7 branch (Issue #12 broker password
kept out of job records, #8 fresh install stamps kept on update, #7
same-cwd workspaces packed). 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 4.4.3 to 4.4.4
- VERSIONS.md: current release v4.4.4 (2026-09-13 KST), the eight-row skill
  matrix, and a v4.4.4 changelog section in the v4.4.3 format covering the
  password-free registry block restored from MQTT_PASSWORD at connect time,
  the scrub on every record write, `registry.py scrub-secrets [--dry-run]`,
  why auth_token/dispatch_token stay, the update.sh stamp and install_state
  merge rules, the sibling-workspace walk in new-session, and the 8 new tests
- VERSIONS.md v4.4.3 ledger correction: its new-test count predated fae70c1,
  which added two purge tests; now 26 (19 + 7) with both listed
- README, README.ko, BOOTSTRAP and BOOTSTRAP.ko badges and the MESSAGING.md
  "Applies to" header follow the current version; historical 4.4.3 mentions
  (v4.4.3 changelog, 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-create/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: multi-agent-mux-create
 description: "Create a new agent session (claude, antigravity/agy) in a dedicated herdr session for context-preserving long-running work. Always creates a herdr session — never backgrounds with nohup/disown. Writes the new session to .mam/agent-sessions.yaml. Use when you want to start a fresh agent (no prior UUID) for a new project workspace."
-version: 4.4.3
+version: 4.4.4
 author: godopu
 license: MIT
 platforms: [linux, macos]