* Initial plan * Add CopyConversationMessagesExecutorTest with 7 comprehensive test cases Co-authored-by: crickman <66376200+crickman@users.noreply.github.com> * Simplify ExecuteTestAsync to avoid duplicate event filtering logic Co-authored-by: crickman <66376200+crickman@users.noreply.github.com> * Refine --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: crickman <66376200+crickman@users.noreply.github.com> Co-authored-by: Chris Rickman <crickman@microsoft.com>