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/Dockerfile

@@ -0,0 +1,36 @@
+FROM node:22-alpine
+
+LABEL description="Live Status v4 - OpenClaw session watcher daemon"
+LABEL source="https://git.eeqj.de/ROOH/MATTERMOST_OPENCLAW_LIVESTATUS"
+
+WORKDIR /app
+
+# Copy package files and install production dependencies only
+COPY package.json package-lock.json ./
+RUN npm ci --production
+
+# Copy source and supporting files
+COPY src/ ./src/
+COPY skill/ ./skill/
+
+# Environment variables (required — set at runtime)
+# MM_TOKEN, MM_URL, TRANSCRIPT_DIR, SESSIONS_JSON must be provided
+ENV NODE_ENV=production \
+    LOG_LEVEL=info \
+    HEALTH_PORT=9090 \
+    THROTTLE_MS=500 \
+    IDLE_TIMEOUT_S=60 \
+    MAX_STATUS_LINES=15 \
+    MAX_ACTIVE_SESSIONS=20 \
+    PID_FILE=/tmp/status-watcher.pid
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+  CMD wget -qO- http://localhost:${HEALTH_PORT}/health || exit 1
+
+# Run as non-root
+USER node
+
+EXPOSE ${HEALTH_PORT}
+
+CMD ["node", "src/watcher-manager.js", "start"]