Easy way to set DataConverter for entire orchestration?

Hello!

I was using a custom struct as an input and return value throughout one of my orchestrations, and I spotted problems with the value transferring between the orchestrations and the tasks. I realised the struct probably wasn't playing ball with JSON.NET, so found a constructor on TaskHubClient that accepted a `DataConverter` that I could pass a `JsonDataConverter` to with custom serialization settings, and custom `JsonConverter`s - hurrah!

I was surprised that this only affected the conversion of the initial inputs to the orchestration and not the conversion between the orchestration, suborchestrations, and tasks.

I found another `DataConverter` on the `OrchestrationContext`, and another on the `TaskOrchestration` itself, and one on the `AsyncTaskActivity` class - that's quite a few, and I'm sure there are benefits to them all using their own `DataConverters`, but is there an easy way to specify a default `DataConverter` that gets used across an entire orchestration instance (and maybe all orchestration instances)? I might very well be missing an easy way to do this, I confess!

Thanks!