listProviders method
The storage providers this store knows about.
A single-process OmnyStore reports exactly one — itself. A hub reports
its own provider plus every connected node, which is what makes the
federation observable.
Implementation
@override
Future<List<ProviderDescriptor>> listProviders({
String? organization,
}) async => _list(
await _call(StoreProtocol.providerList, {'organization': ?organization}),
ProviderDescriptor.fromJson,
);