docs: add JSDoc headers to all externally exported store functions

src/store/company/update.js

@@ -5,6 +5,17 @@ import langEnsure from '../lang/ensure.js';
 import taxEnsure from '../tax/ensure.js';
 import request from '../request.js';
 
+/**
+ * Updates an existing company's name, language and tax rates.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that updates a company.
+ *
+ * @example
+ * const fn = update(pool);
+ * const result = await fn(1, { iso639: 'de', name: 'Acme', taxrate: 19, reducedtaxrate: 7 });
+ * // => { id, rootCategoryId, languageId, taxrateId, reducedtaxrateId, taxfreerateId }
+ */
 export default function update(pool) {
   const byId = getById(pool);
   const byName = getByName(pool);