transaction: add number of retries attempted to return calls

[mdeneen]

If a transaction is successfully processed, return result along with the number of retries. This can be useful for application layer logic which may want to know that retries are happening.

[mdeneen]

Ah, I see that I need to adjust the return types. Give me a few minutes.

[mdeneen]

Can you offer some guidance on the python typing? I think that you will understand what I am going for here.

[janiversen]

This really breaks a lot, as you can see in the CI run.

We do not want to return a tuple, because it would be a lot easier just to add a field in the response, with the added benefit that it is backwards compatible.

[mdeneen]

I see that this will impact existing code too much, so I am going to close this request.

[mdeneen]

Hey, Jan, I will look at adding it to the response.