chore: don't auto-request activity summary if last request caused error (#3735)

lib/pangea/activity_sessions/load_activity_summary_widget.dart

@@ -52,10 +52,10 @@ class LoadActivitySummaryWidgetState extends State<LoadActivitySummaryWidget> {
       return;
     }
 
-    // The summary state event has an error (or > 10 seconds since request)
-    // Re-run immediately
+    if (_summaryEvent!.errorAt == null) {
       await widget.room.fetchSummaries();
     }
+  }
 
   @override
   Widget build(BuildContext context) => const SizedBox();