revert: remove startup seed function — data inserted directly in DB

WhatsAppPhoneNumber (969048009628694 -> default-org-id) and
systemUserToken for XAMLÉ Global seeded directly via script.
No runtime seed needed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/index.ts

@@ -2,7 +2,6 @@ import 'dotenv/config';
 import { buildApp } from './app';
 import { logger } from './logger';
 import { startCleanupCron } from './services/cleanup';
-import { seedGlobalWhatsAppPhoneNumber } from './services/global-whatsapp-seed';
 
 async function start() {
     try {
@@ -14,7 +13,6 @@ async function start() {
         logger.info(`🚀 API Gateway running on http://${host}:${port}`);
 
         startCleanupCron();
-        await seedGlobalWhatsAppPhoneNumber();
     } catch (err) {
         logger.error({ err });
         process.exit(1);