Protobuf copiers/codecs for data types

[jsteinich]

There are a few protobuf types that don't extend from IMessage so they won't be covered by the general protobuf copier.
One place this can come up is from the transaction system.

Microsoft Reviewers: Open in CodeFlow

[ReubenBond]

Thanks, @jsteinich! Am I understanding correctly that these types can currently be serialized via the existing Protocol Buffers integration but not copied, or do we never need to serialize them?

[jsteinich]

Thanks, @jsteinich! Am I understanding correctly that these types can currently be serialized via the existing Protocol Buffers integration but not copied, or do we never need to serialize them?

They can be serialized by the existing integration when they are contained within an IMessage. If they were used directly in a grain method than they would fail to serialize.
We should also add codecs to cover that case. I should be able to do that next week.