feat: Add internal chat system and network access support

- Add messages table schema with soft delete support
- Add message service, controller and routes
- Update CORS to allow local network IPs
- Update server to listen on 0.0.0.0
- Fix cookie sameSite for local network development

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/index.js

@@ -11,9 +11,9 @@ const start = async () => {
     await testConnection();
     logger.success('Database connected');
 
-    // Start server
-    app.listen(port, () => {
-      logger.info(`Server running on http://localhost:${port}`);
+    // Start server - listen on all interfaces for network access
+    app.listen(port, '0.0.0.0', () => {
+      logger.info(`Server running on http://0.0.0.0:${port}`);
       startAllCronJobs();
     });
   } catch (error) {