Eliminate eager model building (#7038)

Eliminate eager model building (#7038)

Previously, we had a special case to support users who directly accessed the model object pointer in the old API.

The special case ensure that the information in the model was eagerly updated after each "sat" response, in the case that the user did not re-request a pointer to the model.

Since users no longer can access the internal model pointer (apart from GetModelCommand), this special case is no longer necessary.

This PR should make us slightly faster for incremental benchmarks where the user asks for the model on some but not all "sat" responses.