fix: resolve tenant member removal and move aggregation bugs

- adminfront: Update removeMutation to correctly pass 'isRemoveTenant: true' and the specific tenant slug instead of empty string
- backend: Fix 'Move' operation (Normal Update) in UpdateUser to correctly remove the old primary company code from the 'companyCodes' array and sync the deletion to Keto, ensuring accurate member count aggregation

adminfront/src/features/user-groups/routes/TenantUserGroupsTab.tsx

@@ -229,7 +229,8 @@ const MemberTable: React.FC<{
   });
 
   const removeMutation = useMutation({
-    mutationFn: (userId: string) => updateUser(userId, { tenantSlug: "" }),
+    mutationFn: (userId: string) =>
+      updateUser(userId, { tenantSlug, isRemoveTenant: true }),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ["tenants-full-tree-v2"] });
       toast.success(t("msg.info.saved_success", "조직에서 제외되었습니다."));