docs: add JSDoc headers to all externally exported store functions

src/store/companysetting/set.js

@@ -2,6 +2,17 @@ import { GET_BY_COMPANY_AND_KEY, UPSERT } from '../../sql/companysetting.js';
 import resolveCompanyAccess from '../companyuser/resolveCompanyAccess.js';
 import shapeSetting from './shapeSetting.js';
 
+/**
+ * Sets (upserts) a company setting by key.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that sets a company setting.
+ *
+ * @example
+ * const fn = set(pool);
+ * const setting = await fn(42, 1, { key: 'theme', value: 'dark', frontend: true });
+ * // => { key, value, frontend }
+ */
 export default function set(pool) {
   const access = resolveCompanyAccess(pool);