def choose_concurrency(task_type: str) -> str:
    # Retorna "threading" para tareas I/O bound,
    # "multiprocessing" para tareas CPU bound,
    # y "unknown" para cualquier otro valor.
    match task_type:
        case "io_bound":
            return "threading"
        case "cpu_bound":
            return "multiprocessing"
        case _:
            return "unknown"