chore: reduce group fetch batch size from 1000 to 500

Agent-Logs-Url: https://github.com/bcc-code/bcc-wp/sessions/87e26907-53f9-414f-b3e7-f0b53d00c6ad

Co-authored-by: rvanoord <1876625+rvanoord@users.noreply.github.com>

Author: Copilot

plugins/bcc-login/includes/class-bcc-coreapi-client.php

@@ -107,7 +107,7 @@ function fetch_groups($group_uids) {
 
         $qry = json_encode($qry);
 
-        $limit = 1000;
+        $limit = 500;
         $offset = 0;
         $all_data = [];
 
@@ -159,7 +159,7 @@ function fetch_groups_by_tag($tag) {
 
         $qry = json_encode($qry);
 
-        $limit = 1000;
+        $limit = 500;
         $offset = 0;
         $all_data = [];