-- 已校验流程的不可变执行计划；同版本不能覆盖历史任务定义。
DO $migration$
DECLARE
    namespace text;
BEGIN
    FOREACH namespace IN ARRAY ARRAY['public', 'evaluation'] LOOP
        EXECUTE format($ddl$
            CREATE TABLE %I.muse_flow_version (
                run_purpose public.muse_purpose NOT NULL,
                flow_id text NOT NULL,
                version text NOT NULL,
                definition jsonb NOT NULL,
                definition_hash text NOT NULL,
                created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
                PRIMARY KEY (run_purpose, flow_id, version)
            )
        $ddl$, namespace);
    END LOOP;
END
$migration$;