docs: add JSDoc headers to all externally exported store functions

src/store/entitycontact/create.js

@@ -12,6 +12,17 @@ function shape(row) {
   };
 }
 
+/**
+ * Creates a new contact for an entity.
+ *
+ * @param {object} pool - The mssql connection pool.
+ * @returns {Function} An async function that creates an entity contact.
+ *
+ * @example
+ * const fn = create(pool);
+ * const contact = await fn(42, 1, 5, { contactType: 'email', contact: 'a@b.c' });
+ * // => { id, entityId, contactType, contact, sort }
+ */
 export default function create(pool) {
   const access = resolveCompanyAccess(pool);
   const entityAccess = resolveEntityAccess(pool);