Set cursor totalItemsMode to exclude with explanatory comment

Cursor requests already carry the computed totalItems from page 1,
so the count query is skipped regardless of this value. Setting it
to 'exclude' reflects what actually happens, and the comment
explains why the value doesn't matter.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/catalog-backend/src/service/DefaultEntitiesCatalog.ts

@@ -870,7 +870,9 @@ function parseCursorFromRequest(
   if (isQueryEntitiesCursorRequest(request)) {
     return {
       ...request.cursor,
-      totalItemsMode: 'include',
+      // Doesn't matter — cursor already carries the computed totalItems
+      // number from the first page, so the count query is skipped regardless.
+      totalItemsMode: 'exclude',
     };
   }
   return {