Affects Version/s: 2.9.2, 3.0.3
Fix Version/s: None
The S3 CopyObjectRequest structure used to build a copy request takes, optionally
- a version ID of the source file
- the etag of the source file
using these will guarantee that the source file is copied exactly once
1. When working with S3Guard in auth mode, and the etag/version are kept in the DDB table, that should be the authoritative source of metadata: fail fast if the file is out of date
2. And when non-auth mode is used, the getObjectMetadata check made should update the s3guard table if needed.