test(products): increase test timeout for category update

- Set Jest timeout to 15 seconds for products.update-category.http.spec.ts
- Ensures reliable execution of category update integration tests

BREAKING CHANGE: None

backend/src/products/products.update-category.http.spec.ts

@@ -5,13 +5,15 @@ import {
   INestApplication,
   ValidationPipe,
 } from '@nestjs/common';
-import { Test, TestingModule } from '@nestjs/testing';
+import { Test, TestingModule } from '@nestjs/testing';
-import request = require('supertest');
+import request = require('supertest');
 
 import { AiService } from '../ai/ai.service';
 import { CategoriesService } from '../categories/categories.service';
-import { ProductsController } from './products.controller';
+import { ProductsController } from './products.controller';
-import { ProductsService } from './products.service';
+import { ProductsService } from './products.service';
+
+jest.setTimeout(15000);
 
 class FakeJwtGuard implements CanActivate {
   canActivate(context: ExecutionContext): boolean {