Add audit logging for CRUD operations

- Extend audit.service.js with logging functions for projects, todos, companies, time tracking, and auth
- Create audit.controller.js for fetching recent audit logs with user info
- Create audit.routes.js with GET /api/audit-logs endpoint
- Add audit logging to project, todo, company, time-tracking, and auth controllers
- Log create/delete operations for projects, todos, companies
- Log timer start/stop for time tracking
- Log login/logout events

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

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

src/app.js

@@ -23,6 +23,7 @@ import projectRoutes from './routes/project.routes.js';
 import todoRoutes from './routes/todo.routes.js';
 import timeTrackingRoutes from './routes/time-tracking.routes.js';
 import noteRoutes from './routes/note.routes.js';
+import auditRoutes from './routes/audit.routes.js';
 
 const app = express();
 
@@ -84,6 +85,7 @@ app.use('/api/projects', projectRoutes);
 app.use('/api/todos', todoRoutes);
 app.use('/api/time-tracking', timeTrackingRoutes);
 app.use('/api/notes', noteRoutes);
+app.use('/api/audit-logs', auditRoutes);
 
 // Basic route
 app.get('/', (req, res) => {