fix(security): drop str(exc) from pagination NotFound message to prevent exception text leakage

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: rtibblesbot

contentcuration/contentcuration/utils/pagination.py

@@ -83,11 +83,8 @@ def paginate_queryset(self, queryset, request, view=None):
 
         try:
             self.page = paginator.page(page_number)
-        except InvalidPage as exc:
-            msg = self.invalid_page_message.format(
-                page_number=page_number, message=str(exc)
-            )
-            raise NotFound(msg)
+        except InvalidPage:
+            raise NotFound("Invalid page: {}".format(page_number))
 
         if paginator.num_pages > 1 and self.template is not None:
             # The browsable API should display pagination controls.