- Add document preview caching logic with in-memory and persisted storage.
- Implement S3 blobstore functions for managing document previews.
- Create rendering functions for PDF and EPUB cover images to JPEG format.
- Introduce database schema and functions for managing document preview metadata.
- Add unit tests for rendering PDF and EPUB previews.
- Implemented user preferences management with a new API for GET and PUT requests.
- Added user document progress tracking with a new API for retrieving and updating progress.
- Introduced database schema changes for user preferences and document progress.
- Enhanced EPUB and TTS contexts to support syncing user preferences and document progress.
- Added functions to handle transferring user preferences and progress during account linking.
- Updated client-side logic to schedule syncing of user preferences and document progress.
