docs: add JSDoc headers to all externally exported store functions

src/store/article/updateBySku.js

@@ -20,6 +20,17 @@ function formatUnitLabel(amount, symbol) {
   return `${Number(amount)}${sym}`;
 }
 
+/**
+ * Updates an article's name and/or unit (SI and amount), recording history.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that updates an article by SKU.
+ *
+ * @example
+ * const fn = updateBySku(pool);
+ * const article = await fn(42, 'SKU-1', { name: 'Cola 1L', unitSi: 'l', unitamount: 1 });
+ * // => { id, sku, name, ... }
+ */
 export default function updateBySku(pool) {
   const resolve = resolveArticleBySku(pool);
   const load = queryBySku(pool);