Function build_router_with_auth_and_admin 

pub fn build_router_with_auth_and_admin(
    router: Arc<RequestRouter>,
    ws_broadcaster: Arc<WsBroadcaster>,
    key_store: Arc<KeyStore>,
    counters: Arc<RuntimeCounters>,
    admin_status_provider: Option<AdminStatusProvider>,
) -> Router

v1.4.32+ 扩展：额外传入 admin_status_provider，/api/admin/status 用。 旧 build_router_with_auth 内部委托到此，admin_status_provider = None 时行为与之前完全一致（admin_status endpoint 返 503）。