Return the messages as well in response for potentially fewer retries.

[HamzaFarhan]

Is your feature request related to a problem? Please describe.
The model and the user don't know what it took to get the correct response.

Describe the solution you'd like
For each failed attempt, the messages get updated like this:

kwargs["messages"].extend(reask_messages(response, mode, e))

It would be nice to receive the final list of messages in _raw_response that led to a successful response so that it can optionally be used as a starting point for the next request. That way the model can look at its previous mistakes and give the correct response with fewer retries.