feat(broker+cli): multi-tenant telegram bridge with 4 entry points

- DB: mesh.telegram_bridge table + migration
- Broker: telegram-bridge.ts (Grammy bot + WS pool + routing)
- Broker: telegram-token.ts (JWT connect tokens)
- Broker: POST /tg/token endpoint + bridge boot on startup
- CLI: claudemesh connect/disconnect telegram commands
- Spec: docs/telegram-bridge-spec.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/telegram/Dockerfile

@@ -0,0 +1,15 @@
+# Telegram bridge for claudemesh
+# Node 22 runtime with tsx for TypeScript execution
+
+FROM node:22-slim
+
+WORKDIR /app
+
+COPY package.json ./
+RUN npm install --omit=dev
+
+COPY src/ ./src/
+
+ENV NODE_ENV=production
+
+CMD ["npx", "tsx", "src/index.ts"]