- Introduced `format_scalar_for_prompt_text` function to standardize the representation of scalar values in activity summaries and details.
- Updated `get_activity_summary` and `get_activity_detail` functions to utilize the new formatting for improved readability.
- Added normalization for float values in session metrics to prevent excessively long representations.
- Enhanced unit tests to verify the new formatting and normalization behavior.
- Integrated compact JSON payload generation for session metrics in `get_training_sessions_recent_weeks_data`.
- Updated the registration of activity session insights to reflect the new compact format for session metrics.
- Improved documentation to clarify the structure and semantics of the session metrics in the JSON output.
- Added normalization for prompt numbers to ensure consistent formatting in the metrics.
