show history event count (#700)

Author: Assem-Hafez

src/views/workflow-summary-tab/config/workflow-summary-tab-details.config.ts

@@ -89,6 +89,12 @@ const workflowSummaryTabDetailsConfig: WorkflowSummaryTabDetailsConfig[] = [
     hide: ({ firstEvent }) =>
       !firstEvent?.workflowExecutionStartedEventAttributes?.cronSchedule,
   },
+  {
+    key: 'historyEventsCount',
+    getLabel: () => 'History events',
+    valueComponent: ({ workflowDetails }) =>
+      workflowDetails.workflowExecutionInfo?.historyLength,
+  },
   {
     key: 'taskList',
     getLabel: () => 'Task list',