docs: Add a TODO comment for the future migration of the pageWeight data field to a new Firestore database.

Signed-off-by: Max Ostapenko <1611259+max-ostapenko@users.noreply.github.com>

Author: max-ostapenko

src/controllers/reportController.js

@@ -20,7 +20,7 @@ const REPORT_CONFIGS = {
     },
     pageWeight: {
         table: 'page_weight',
-        dataField: 'pageWeight'
+        dataField: 'pageWeight'  // TODO: change to page_weight once migrated to new Firestore DB
     },
     lighthouse: {
         table: 'lighthouse',