docs: add JSDoc headers to all externally exported store functions

src/store/article/delete.js

@@ -11,6 +11,16 @@ import {
 import resolveArticleBySku from './resolveArticleBySku.js';
 import request from '../request.js';
 
+/**
+ * Deletes an article by its SKU, refusing when it still has children.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that deletes an article.
+ *
+ * @example
+ * const fn = del(pool);
+ * await fn(42, 'SKU-1');
+ */
 export default function del(pool) {
   const resolve = resolveArticleBySku(pool);