-- B07作者自报观察与实际反馈绑定；未知指标保留NULL，不自动建立因果或启用目标。
CREATE TABLE public.muse_author_observation (
    observation_id uuid PRIMARY KEY,
    author_id text NOT NULL,
    command_id text NOT NULL,
    feedback_ids uuid[] NOT NULL CHECK(cardinality(feedback_ids) > 0),
    improvement_id uuid,
    improvement_revision integer,
    payload jsonb NOT NULL,
    content_hash text NOT NULL CHECK(content_hash ~ '^[0-9a-f]{64}$'),
    created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
    UNIQUE(author_id,command_id),
    CHECK ((improvement_id IS NULL) = (improvement_revision IS NULL)),
    FOREIGN KEY(improvement_id,improvement_revision)
        REFERENCES public.muse_improvement_version(improvement_id,revision)
);
CREATE TRIGGER muse_author_observation_immutable BEFORE UPDATE OR DELETE
    ON public.muse_author_observation FOR EACH ROW
    EXECUTE FUNCTION public.muse_guard_literary_history();
REVOKE ALL ON public.muse_author_observation FROM muse_eval;
GRANT SELECT,INSERT ON public.muse_author_observation TO muse_app;