-- 文学片结果和完整报告由B06持有，任务运行只记录引用和执行证据。
CREATE TABLE public.muse_literary_shard (
    task_id uuid NOT NULL REFERENCES public.muse_task(task_id),
    shard_id text NOT NULL CHECK (shard_id ~ '^[0-9a-f]{64}$'),
    attempt_id uuid NOT NULL REFERENCES public.muse_attempt(attempt_id),
    call_id text NOT NULL,
    author_id text NOT NULL,
    snapshot_id uuid NOT NULL REFERENCES public.muse_context_snapshot(snapshot_id),
    basis_hash text NOT NULL CHECK (basis_hash ~ '^[0-9a-f]{64}$'),
    payload jsonb NOT NULL CHECK (jsonb_typeof(payload) = 'object'),
    payload_hash text NOT NULL CHECK (payload_hash ~ '^[0-9a-f]{64}$'),
    evidence jsonb NOT NULL CHECK (jsonb_typeof(evidence) = 'object'),
    created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
    PRIMARY KEY (task_id, shard_id),
    UNIQUE (task_id, call_id)
);
CREATE TABLE public.muse_literary_report (
    report_id uuid PRIMARY KEY,
    task_id uuid NOT NULL UNIQUE REFERENCES public.muse_task(task_id),
    author_id text NOT NULL,
    revision bigint NOT NULL DEFAULT 1 CHECK (revision = 1),
    payload jsonb NOT NULL CHECK (jsonb_typeof(payload) = 'object'),
    payload_hash text NOT NULL CHECK (payload_hash ~ '^[0-9a-f]{64}$'),
    created_at timestamptz NOT NULL DEFAULT clock_timestamp()
);
CREATE FUNCTION public.muse_guard_literary_history() RETURNS trigger LANGUAGE plpgsql AS $$
BEGIN
    RAISE EXCEPTION '文学片结果与报告只追加，不改写或删除历史';
END;
$$;
CREATE TRIGGER muse_literary_shard_guard BEFORE UPDATE OR DELETE ON public.muse_literary_shard
FOR EACH ROW EXECUTE FUNCTION public.muse_guard_literary_history();
CREATE TRIGGER muse_literary_report_guard BEFORE UPDATE OR DELETE ON public.muse_literary_report
FOR EACH ROW EXECUTE FUNCTION public.muse_guard_literary_history();