.NET: fix: Sporadic failure of Checkpoint Restore with PendingRequests tests#5086

lokitoth wants to merge 2 commits intomainmicrosoft/agent-framework:mainfrom

dev/dotnet_workflow/fix_flaky_checkpoint_restore_testmicrosoft/agent-framework:dev/dotnet_workflow/fix_flaky_checkpoint_restore_testCopy head branch name to clipboard