Migrate test fixtures to ConversationState.append_event#3331

csmith49 wants to merge 4 commits into

incremental-view-prepare-llm-messagesOpenHands/software-agent-sdk:incremental-view-prepare-llm-messagesfrom

cleanup-test-state-append-eventOpenHands/software-agent-sdk:cleanup-test-state-append-eventCopy head branch name to clipboard