docs: add JSDoc headers to all externally exported store functions

src/store/delivery/update.js

@@ -15,6 +15,17 @@ import {
 } from './helpers.js';
 import { assertSupplier, insertLines } from './writeLines.js';
 
+/**
+ * Updates a delivery's header and/or lines.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that updates a delivery.
+ *
+ * @example
+ * const fn = update(pool);
+ * const delivery = await fn(42, 1, 5, { number: 'D-2', lines: [...] });
+ * // => { id, number, type, entityId, date, lines: [...] }
+ */
 export default function update(pool) {
   const access = resolveCompanyAccess(pool);
   const ensureTax = taxEnsure(pool);