Add request/response logging middleware to enhance auditing and debugging

server/index.js

@@ -3,6 +3,7 @@ import express from 'express';
 import cors from 'cors';
 import path from 'path';
 import { fileURLToPath } from 'url';
+import requestResponseLogger from './middleware/logging.js';
 import { initDatabase } from './config/database.js';
 import { initMailer } from './config/mailer.js';
 import authRoutes from './routes/auth.js';
@@ -31,6 +32,8 @@ const corsOptions = process.env.APP_URL
   : {};
 app.use(cors(corsOptions));
 app.use(express.json());
+// Request/Response logging (filters sensitive fields)
+app.use(requestResponseLogger);
 
 // Initialize database & start server
 async function start() {