Adds storage class information to file metadata and API responses.
This change introduces the ability to store file storage classes in file metadata and display them in API responses. This allows users to view a file's storage tier (e.g., S3 Standard, Glacier), enhancing data management capabilities.
Implementation details include:
- Introducing the StorageClassProvider interface and the ObjWrapStorageClass structure to uniformly handle and communicate object storage class information.
- Updated file metadata structures (e.g., ArchiveObj, FileInfo, RespFile) to include a StorageClass field.
- Modified relevant API response functions (e.g., GetFileInfo, GetFileList) to populate and return storage classes.
- Integrated functionality for retrieving object storage classes from underlying storage systems (e.g., S3) and wrapping them in lists.
Introduces a new 'storage_class' configuration option for S3 providers. Users can now specify the desired storage class (e.g., Standard, GLACIER, DEEP_ARCHIVE) for objects uploaded to S3-compatible services like AWS S3 and Tencent COS.
The input storage class string is normalized to match AWS SDK constants, supporting various common aliases. If an unknown storage class is provided, it will be used as a raw value with a warning. This enhancement provides greater control over storage costs and data access patterns.
