Function register_encrypted 

pub fn register_encrypted<T, F, Fut>(
    registry: &mut Registry,
    keys: Arc<dyn KeyProvider>,
    handler: F,
) -> Result<(), String>
where
    T: Task,
    F: Fn(JobCtx, T) -> Fut + Send + Sync + 'static,
    Fut: Future<Output = Result<(), JobError>> + Send + 'static,