693ef16060
- Add ThreadPoolExecutor in agent_worker for parallel request execution - Add request_id correlation to prevent response mismatch between concurrent requests - Add background listener thread per agent to dispatch responses to correct futures - Add --timeout argument for hard request timeout (default: 120s from config) - Remove signal handlers from terminal_manager, python_manager, tab_manager (use atexit only) - Replace SIGALRM timeout in python_instance with threading-based timeout This fixes requests getting queued behind slow operations and timeouts.