Function with_executor 

pub async fn with_executor<F: Future>(
    executor: Arc<dyn Executor>,
    fut: F,
) -> F::Output

Install executor without tagging a scope. Prefer the request/job variants at framework boundaries so authorization can distinguish the two paths. An untagged (unset) scope is treated as fail-closed by a scope-aware Repo: with no ambient ability it denies every row, exactly like a request — only with_job_executor grants unscoped reads.