Initial commit: Telegram Management System

Full-stack web application for Telegram management
- Frontend: Vue 3 + Vben Admin
- Backend: NestJS
- Features: User management, group broadcast, statistics

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

marketing-agent/services/logging/examples/integration.js

@@ -0,0 +1,103 @@
+// Example: How to integrate the logging client in your service
+
+import express from 'express';
+import { createLoggingClient } from '../src/client/index.js';
+
+// Initialize logging client
+const logger = createLoggingClient({
+  serviceName: 'api-gateway',
+  redisHost: 'localhost',
+  redisPort: 6379,
+  logLevel: 'info'
+});
+
+// Create Express app
+const app = express();
+
+// Use logging middleware
+app.use(logger.expressMiddleware());
+
+// Example route with logging
+app.get('/api/users/:id', async (req, res) => {
+  try {
+    // Log the operation
+    await logger.info('Fetching user', {
+      userId: req.params.id,
+      requestedBy: req.user?.id
+    });
+
+    // Simulate fetching user
+    const user = { id: req.params.id, name: 'John Doe' };
+
+    // Send metric
+    await logger.metric('user_fetch_success', 1, {
+      userId: req.params.id
+    });
+
+    res.json(user);
+  } catch (error) {
+    // Log error
+    await logger.error(error, {
+      userId: req.params.id,
+      operation: 'user_fetch'
+    });
+
+    res.status(500).json({ error: 'Internal server error' });
+  }
+});
+
+// Example of logging different levels
+async function exampleLogging() {
+  // Debug logging
+  await logger.debug('Debug message', { detail: 'some debug info' });
+
+  // Info logging
+  await logger.info('User logged in', { userId: 'user123' });
+
+  // Warning logging
+  await logger.warn('API rate limit approaching', {
+    userId: 'user123',
+    current: 95,
+    limit: 100
+  });
+
+  // Error logging
+  try {
+    throw new Error('Database connection failed');
+  } catch (error) {
+    await logger.error(error, {
+      database: 'mongodb',
+      host: 'localhost'
+    });
+  }
+
+  // Metrics
+  await logger.metric('api_requests', 1, {
+    endpoint: '/api/users',
+    method: 'GET'
+  });
+
+  await logger.metric('response_time', 234.5, {
+    endpoint: '/api/users',
+    method: 'GET'
+  });
+
+  await logger.metric('memory_usage', process.memoryUsage().heapUsed / 1024 / 1024, {
+    unit: 'MB'
+  });
+}
+
+// Run examples
+exampleLogging();
+
+// Start server
+app.listen(3000, () => {
+  logger.info('API Gateway started', { port: 3000 });
+});
+
+// Graceful shutdown
+process.on('SIGTERM', async () => {
+  await logger.info('Shutting down service');
+  await logger.close();
+  process.exit(0);
+});