discover method
2026-07-28 stateless core: fetch the server's supported versions,
capabilities, and optional instructions via server/discover.
Servers MUST implement server/discover; clients MAY call it (version
negotiation can also happen inline via per-request _meta). Callable
without a prior handshake. As a side effect the parsed
ServerCapabilities and server info are cached on this client
(serverCapabilities / serverInfo).
Implementation
@override
Future<DiscoverResult> discover({RequestOptions? options}) =>
inner.discover(options: options);