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.
- Add BundleManifest with dsl_filename for 100% tree ID restoration
- Implement two-step import flow: prepare (get upload URL) + confirm
- Use sandbox for zip extraction and file upload via presigned URLs
- Store import session in Redis with 1h TTL
- Add SandboxUploadItem for symmetric download/upload API
- Remove legacy source_zip_extractor, inline logic in service
- Update frontend to use new prepare/confirm API flow
- 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.
- Introduced AppBundleService for managing app bundle publishing and importing, integrating workflow and asset services.
- Added methods for exporting app bundles as ZIP files, including DSL and asset management.
- Implemented source zip extraction and validation to enhance asset import processes.
- Refactored asset packaging to utilize AssetZipPackager for improved performance and organization.
- Enhanced error handling for bundle format and security during import operations.
