system health 추가

backend/src/system/system.controller.ts

@@ -0,0 +1,14 @@
+import { Controller, Get } from '@nestjs/common';
+import { SystemService, SystemHealthResponse } from './system.service';
+import { Public } from '../common/decorators/public.decorator';
+
+@Controller('system')
+export class SystemController {
+  constructor(private readonly systemService: SystemService) {}
+
+  @Public()
+  @Get('health')
+  async getHealth(): Promise<SystemHealthResponse> {
+    return this.systemService.getHealth();
+  }
+}