-- 停止决定独立追加，执行计划与已发生交付保持不变。
CREATE TABLE evaluation.muse_experiment_stop (
    experiment_id uuid PRIMARY KEY REFERENCES evaluation.muse_experiment_execution(experiment_id),
    author_id text NOT NULL,
    command_id text NOT NULL,
    stopped_at timestamptz NOT NULL DEFAULT clock_timestamp()
);
CREATE TRIGGER experiment_stop_guard BEFORE UPDATE OR DELETE ON evaluation.muse_experiment_stop
FOR EACH ROW EXECUTE FUNCTION public.muse_guard_literary_history();