Schema Registry support [suggestion]

[jonykalavera]

I think it would be a good thing to be able to use schema registry to serialize/deserialize messages produced/consumed by async actors.

I don't know if there is already a recommended way to deal with this. At some point, I thought I could achieve this with interceptors but upon closer inspection, it seems they are meant for HTTP interactions. Maybe we should implement something analogous to this interceptor concept but for producers and consumers.