feat(api): add impuestos API endpoints (IVA/ISR mensual y resumen)

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

apps/api/src/app.ts

@@ -6,6 +6,7 @@ import { errorMiddleware } from './middlewares/error.middleware.js';
 import { authRoutes } from './routes/auth.routes.js';
 import { dashboardRoutes } from './routes/dashboard.routes.js';
 import { cfdiRoutes } from './routes/cfdi.routes.js';
+import { impuestosRoutes } from './routes/impuestos.routes.js';
 
 const app = express();
 
@@ -29,6 +30,7 @@ app.get('/health', (req, res) => {
 app.use('/api/auth', authRoutes);
 app.use('/api/dashboard', dashboardRoutes);
 app.use('/api/cfdi', cfdiRoutes);
+app.use('/api/impuestos', impuestosRoutes);
 
 // Error handling
 app.use(errorMiddleware);