Added support for an optional `download_filename` parameter in the `get_download_url` and `get_download_urls` methods across various storage classes. This allows users to specify a custom filename for downloads, improving user experience by enabling better file naming during downloads. Updated related methods and tests to accommodate this new functionality.
- Updated storage wrappers to utilize a new base class, StorageWrapper, for better delegation of methods.
- Introduced SilentStorage to handle read operations gracefully by returning empty values instead of raising exceptions.
- Enhanced CachedPresignStorage to support batch caching of download URLs, improving performance.
- Refactored FilePresignStorage to support both presigned URLs and signed proxy URLs for downloads.
- Updated AppAssetService to utilize the new storage structure, ensuring consistent asset management.
