Please explain the motivation behind the feature request.
When working with both LLMs and tools, I sometimes want to know how long an action took, so I can catch prompts or tool configs that could be more efficient. I guess I can parse the session logs after the fact to work out timing, but if I could see it right in the moment, I could then ask the LLM for suggestions.

Describe the solution you'd like
Elapsed time shown in the session output after each request completes.

Describe alternatives you've considered
Generating timestamps from session logs outside of the session itself.

Additional context
N/A

• I have verified this does not duplicate an existing feature request