feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params)
- Add findByTemplateId method to service
- Add GET /by-template/:templateId endpoint to controller
- Service already includes CRUD for QuestionBank and QuestionBankItem

server/src/main.ts

@@ -0,0 +1,35 @@
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+import { ValidationPipe } from '@nestjs/common';
+import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  app.useGlobalPipes(new ValidationPipe());
+  app.enableCors({
+    origin: true, // Allow all origins
+    methods: 'GET,HEAD,PUT,PATCH,POST,DELETE,OPTIONS',
+    credentials: true,
+  });
+  app.setGlobalPrefix('api'); // Set a global API prefix
+
+  // Swagger / OpenAPI documentation
+  const config = new DocumentBuilder()
+    .setTitle('AuraK API')
+    .setDescription(
+      'External API for accessing AuraK functionalities via API Key',
+    )
+    .setVersion('1.0')
+    .addApiKey({ type: 'apiKey', name: 'x-api-key', in: 'header' }, 'x-api-key')
+    .build();
+  const document = SwaggerModule.createDocument(app, config);
+  SwaggerModule.setup('api/docs', app, document);
+
+  await app.listen(process.env.PORT ?? 3001);
+
+  // Ensure "Default" tenant exists
+  const { TenantService } = await import('./tenant/tenant.service');
+  const tenantService = app.get(TenantService);
+  await tenantService.ensureDefaultTenant();
+}
+bootstrap();