Feature request: Include message ID on envelopes in all endpoints

[neekolas]

Is your feature request related to a problem?

In some cases, callers interacting with our APIs directly (for example, users of StreamAllMessages) may need the message ID independent of our SDKs. While it can be computed from values in the envelope, this adds complexity and room for error.

Describe the solution to the problem

We should just include the ID on all envelopes returned from the APIs (Query, Subscribe, Subscribe2, SubscribeAll)

Describe the uses cases for the feature

No response

Additional details

Once completed we will need to update our SDKs to make use of this data and skip client-side generation of IDs