feat(sync): synchronize Hiboutik data through POST /sync

POST /sync starts the full synchronization in the background (202, or 409 when one is already running). Entities are synced in dependency order: brands, categories, suppliers, products (with versions and stocks), customers. Each row is synced independently so that a failure is logged without stopping the rest. Replaces the default AppService.

src/app.controller.spec.ts

@@ -1,22 +1,29 @@
+import { ConflictException } from '@nestjs/common';
 import { Test, TestingModule } from '@nestjs/testing';
 import { AppController } from './app.controller';
-import { AppService } from './app.service';
+import { HiboutikService } from './services/hiboutik/hiboutik.service';
 
 describe('AppController', () => {
-  let appController: AppController;
+  let controller: AppController;
+  const hiboutikService = { startSync: jest.fn() };
 
   beforeEach(async () => {
-    const app: TestingModule = await Test.createTestingModule({
+    hiboutikService.startSync.mockReset();
+    const module: TestingModule = await Test.createTestingModule({
       controllers: [AppController],
-      providers: [AppService],
+      providers: [{ provide: HiboutikService, useValue: hiboutikService }],
     }).compile();
-
-    appController = app.get<AppController>(AppController);
+    controller = module.get(AppController);
   });
 
-  describe('root', () => {
-    it('should return "Hello World!"', () => {
-      expect(appController.getHello()).toBe('Hello World!');
-    });
+  it('starts a synchronization', () => {
+    hiboutikService.startSync.mockReturnValue(true);
+    expect(controller.hiboutikSync()).toEqual({ message: 'Hiboutik synchronization started' });
+    expect(hiboutikService.startSync).toHaveBeenCalledTimes(1);
+  });
+
+  it('rejects a synchronization when one is already running', () => {
+    hiboutikService.startSync.mockReturnValue(false);
+    expect(() => controller.hiboutikSync()).toThrow(ConflictException);
   });
 });