feat: auto-populate department_id on create + seed default campus with backfill

apps/server/src/main.ts

@@ -1,12 +1,16 @@
 import { NestFactory } from '@nestjs/core';
 import { ValidationPipe } from '@nestjs/common';
+import { DataSource } from 'typeorm';
 import { AppModule } from './app.module';
+import { seedDefaultCampus } from './departments/seed';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
   app.setGlobalPrefix('api');
   app.enableCors();
   app.useGlobalPipes(new ValidationPipe({ transform: true, whitelist: true }));
+  const dataSource = app.get(DataSource);
+  await seedDefaultCampus(dataSource);
   await app.listen(process.env.PORT ?? 3003);
   console.log(`Server running on http://localhost:${process.env.PORT ?? 3003}`);
 }