Function start_with_auth 

pub async fn start_with_auth(
    listen_addr: &str,
    router: Arc<RequestRouter>,
    push_broadcaster: Arc<GrpcPushBroadcaster>,
    key_store: Arc<KeyStore>,
    counters: Arc<RuntimeCounters>,
) -> Result<(), Box<dyn Error>>

启动 gRPC 服务（带 KeyStore 鉴权 + 共享限额 counters）