refactor: remove score_decay_rate and update formatting

[Septimus4]

Checklist

• [ ] poetry run pytest passes locally with my changes
• [ ] Tests have been added or updated to cover the changes
• [ ] Documentation has been updated as needed
• [ ] Code style checks pass
• [ ] Commit messages follow the Conventional Commits guidelines

Affected Components

Description of Changes

Removed unused score_decay_rate from schema and documentation. Cleaned up code formatting and improved consistency across methods. Updated markdown documentation to align with current schema changes.

Additional Notes