- Introduced methods to retrieve comprehensive statistics for preferences, including summary and detailed per-key information.
- Implemented a new `getStats` method to provide insights into subscription counts and active windows.
- Enhanced the PreferenceService with additional interfaces for better type safety and clarity in statistics handling.
- Updated documentation to reflect the new statistics features and their usage.
- Revised the README files for shared data and main data layers to improve clarity and structure.
- Consolidated documentation on shared data types and API types, removing the now-deleted `api-design-guidelines.md`.
- Streamlined directory structure descriptions and updated links to relevant documentation.
- Enhanced quick reference sections for better usability and understanding of the data architecture.
