docs: add JSDoc headers to all externally exported store functions

src/store/supplier/create.js

@@ -4,6 +4,17 @@ import request from '../request.js';
 import resolveCompanyAccess from '../companyuser/resolveCompanyAccess.js';
 import ensureLieferantenGroup from './ensureLieferantenGroup.js';
 
+/**
+ * Creates a new supplier for a company, recording history.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that creates a supplier.
+ *
+ * @example
+ * const fn = create(pool);
+ * const supplier = await fn(42, 1, { name: 'Acme Supplies' });
+ * // => { id, name, createdAt, updatedAt }
+ */
 export default function create(pool) {
   const access = resolveCompanyAccess(pool);