docs: add JSDoc headers to all externally exported store functions

src/store/delivery/create.js

@@ -9,6 +9,17 @@ import {
 } from './helpers.js';
 import { assertSupplier, insertLines } from './writeLines.js';
 
+/**
+ * Creates a new delivery for a company with its lines.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that creates a delivery.
+ *
+ * @example
+ * const fn = create(pool);
+ * const delivery = await fn(42, 1, { number: 'D-1', date: '2026-01-01', supplierId: 5, lines: [...] });
+ * // => { id, number, type, entityId, date, lines: [...] }
+ */
 export default function create(pool) {
   const access = resolveCompanyAccess(pool);
   const ensureTax = taxEnsure(pool);