Add article.listSearchIndex for client-side search preload

Returns all company articles with id, sku, name, and eans as a flat
array. Walks the category tree to find reachable articles. Single
query using recursive CTE + FOR JSON for eans.

src/index.js

@@ -20,6 +20,7 @@ import articleOrderImages from './store/article/orderImages.js';
 import articleAddImage from './store/article/addImage.js';
 import articleCreateUnderParent from './store/article/createUnderParent.js';
 import articleGetBySku from './store/article/getBySku.js';
+import articleListSearchIndex from './store/article/listSearchIndex.js';
 import articleUpdateBySku from './store/article/updateBySku.js';
 import articleSetPricesBySku from './store/article/setPricesBySku.js';
 import articleSetEansBySku from './store/article/setEansBySku.js';
@@ -95,6 +96,7 @@ export default class LibDashStore {
     this.article = {
       createUnderParent: articleCreateUnderParent(pool),
       getBySku: articleGetBySku(pool),
+      listSearchIndex: articleListSearchIndex(pool),
       updateBySku: articleUpdateBySku(pool),
       setPricesBySku: articleSetPricesBySku(pool),
       setEansBySku: articleSetEansBySku(pool),