feat(sat): add scheduled cron job for daily sync (Phase 6)

- Add sat-sync.job.ts with scheduled daily sync at 3:00 AM
- Automatic detection of tenants with active FIEL
- Initial sync (10 years) for new tenants, daily for existing
- Concurrent processing with configurable batch size
- Integration with app startup for production environment
- Install node-cron dependency

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

apps/api/src/index.ts

@@ -1,9 +1,15 @@
 import { app } from './app.js';
 import { env } from './config/env.js';
+import { startSatSyncJob } from './jobs/sat-sync.job.js';
 
 const PORT = parseInt(env.PORT, 10);
 
 app.listen(PORT, '0.0.0.0', () => {
-  console.log(`🚀 API Server running on http://0.0.0.0:${PORT}`);
-  console.log(`📊 Environment: ${env.NODE_ENV}`);
+  console.log(`API Server running on http://0.0.0.0:${PORT}`);
+  console.log(`Environment: ${env.NODE_ENV}`);
+
+  // Iniciar job de sincronización SAT
+  if (env.NODE_ENV === 'production') {
+    startSatSyncJob();
+  }
 });