Pre/Post application interface calls

[elijahbenizzy]

Is your feature request related to a problem? Please describe.

We should be able to handle iteractions such as step/iterate/run/stream). These would be hooks called before and after user-facing stuff.

Describe the solution you'd like

The following hooks, both sync and async:

• pre_run_call(params: Dict[str, Any], fn: Enum["run", "iterate", "step", "stream_results"])
• post_run_call(params: Dict[str, Any], fn: Enum["run", "iterate", "step", "stream_results"])

Describe alternatives you've considered

Hooks per step