- Added details for Issue #53 regarding the audit of activity placeholders between Layer 1 and Layer 2a in `CLAUDE.md` and `README.md`.
- Updated the `ACTIVITY_SESSION_METRICS_EAV_AGENT_GUIDE.md` to reflect the new registry checks and dynamic session metrics handling.
- Revised the `placeholder_resolver.py` and `activity_metrics.py` to clarify the registration of activity metrics and session insights, ensuring consistency in the handling of dynamic keys and metrics.
- Improved descriptions and semantic contracts in `activity_session_insights.py` to better outline the structure and limitations of session data.
- Introduced Activity Session Metrics for enhanced tracking of session data.
- Updated backend to support new API endpoints for managing session metrics.
- Added new Pydantic models for activity metrics and replaced metrics functionality.
- Enhanced data layer to include session metrics in recent training session data.
- Updated documentation to reflect changes in session metrics handling.
- Added new functions for BMI and goal weight/body fat percentage retrieval in `body_metrics.py`.
- Introduced training frequency and inter-session gap calculations in `activity_metrics.py`.
- Updated placeholder registrations to include new metrics for nutrition and activity.
- Improved data handling in `placeholder_resolver.py` for better integration of new metrics.
- Enhanced documentation across modules to reflect the new functionalities.
These updates improve the accuracy and comprehensiveness of health and fitness assessments within the application.
