fix(backend): switch OFF API to /cgi/search.pl endpoint and fix test imports

- Changed from /api/v2/search (returning 503) to /cgi/search.pl (working)
- Removed strict categories_tags=baby-food filter that was too restrictive
- Fixed test file to use dynamic imports for ES module compatibility
- Increased timeout to 10s for reliability

apps/backend/off-service.js

@@ -1,7 +1,7 @@
 import axios from 'axios';
 import redisClient from './redis-client.js';
 
-const OFF_API_BASE = 'https://world.openfoodfacts.org/api/v2';
+const OFF_API_BASE = 'https://world.openfoodfacts.org';
 const CACHE_TTL = 3600;
 
 export function transformOFFProduct(offProduct) {
@@ -53,15 +53,15 @@ export async function searchBabyProducts(query) {
     }
 
     console.log(`Fetching from OFF API: ${searchTerm}`);
-    const response = await axios.get(`${OFF_API_BASE}/search`, {
+    const response = await axios.get(`${OFF_API_BASE}/cgi/search.pl`, {
       params: {
-        categories_tags: 'baby-food',
         search_terms: searchTerm,
         json: true,
         fields: 'product_name,brands,image_url,nutriscore_grade,ingredients_text,nova_group,ecoscore_grade,categories_tags',
         page_size: 20,
+        action: 'process',
       },
-      timeout: 5000,
+      timeout: 10000,
     });
 
     if (response.data && response.data.products) {
@@ -100,8 +100,8 @@ export async function getBabyProductDetails(barcode) {
     }
 
     console.log(`Fetching OFF product details: ${barcode}`);
-    const response = await axios.get(`${OFF_API_BASE}/product/${barcode}.json`, {
-      timeout: 5000,
+    const response = await axios.get(`${OFF_API_BASE}/api/v2/product/${barcode}.json`, {
+      timeout: 10000,
     });
 
     if (response.data && response.data.product) {