feat(phase5): polish + deployment

- skill/SKILL.md: rewritten to 9 lines — 'status is automatic'
- deploy-to-agents.sh: no AGENTS.md injection; deploys hook + npm install
- install.sh: clean install flow; prints required env vars
- deploy/status-watcher.service: systemd unit file
- deploy/Dockerfile: containerized deployment (node:22-alpine)
- src/live-status.js: deprecation warning + start-watcher/stop-watcher pass-through
- README.md: full docs (architecture, install, config, upgrade guide, troubleshooting)
- make check: 0 errors, 0 format issues
- npm test: 59 unit + 36 integration = 95 tests passing

deploy/status-watcher.service

@@ -0,0 +1,36 @@
+[Unit]
+Description=Live Status v4 - OpenClaw session watcher daemon
+Documentation=https://git.eeqj.de/ROOH/MATTERMOST_OPENCLAW_LIVESTATUS
+After=network.target
+
+[Service]
+Type=simple
+User=node
+WorkingDirectory=/opt/openclaw-live-status
+
+# Load environment variables from file
+EnvironmentFile=/etc/status-watcher.env
+
+# Start the watcher daemon directly (not via CLI wrapper)
+ExecStart=/usr/bin/node /opt/openclaw-live-status/src/watcher-manager.js start
+
+# Graceful shutdown — watcher handles SIGTERM (marks boxes interrupted, flushes)
+ExecStop=/bin/kill -TERM $MAINPID
+
+# Restart policy
+Restart=on-failure
+RestartSec=5s
+StartLimitBurst=3
+StartLimitIntervalSec=60s
+
+# Logging — output goes to journald
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=status-watcher
+
+# Security hardening
+NoNewPrivileges=true
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target