ISendMyself published from a projection side effect is dropped (e.g. ToWebSocketGroup, ToEndpoint)

[erdtsieck]

Publishing an ISendMyself from a Marten projection's RaiseSideEffects silently drops the message.

public override ValueTask RaiseSideEffects(IDocumentOperations operations, IEventSlice<MyDoc> slice)
{
    slice.PublishMessage(new MyUpdated().ToWebSocketGroup(slice.TenantId));   // never reaches the group
    slice.PublishMessage(new MyCommand(slice.Id).ToEndpoint("side-effects")); // never reaches the queue
    return ValueTask.CompletedTask;
}

MartenToWolverineMessageBatch always passes DeliveryOptions (at least the tenant id) to MessageContext.PublishAsync. MessageBus.PublishAsync only applies an ISendMyself when options == null, so the wrapper is routed as its own type (SignalRMessage<T>, RoutedToEndpointMessage<T>, DeliveryMessage<T>, ...), finds no route, and becomes NoRoutes.

The workaround is an extra local hop: publish a plain message from the projection, and in its handler return the ISendMyself as a cascading message. We carry about 25 of those hops just to push SignalR group notifications from projections.