add clarification to helper

Signed-off-by: Adhitya Mamallan <adhitya.mamallan@uber.com>

Author: adhityamamallan

src/views/shared/workflows-list/helpers/get-column-ids-local-storage-key.ts

@@ -1,3 +1,9 @@
+/**
+ * Returns the local storage key for persisted column IDs.
+ *
+ * Keyed by domain name rather than domain ID intentionally —
+ * domains that share a name likely serve the same use case for a given user.
+ */
 export default function getColumnIdsLocalStorageKey(domain: string) {
   return `columns_${domain}`;
 }