v0.22.0

Breaking changes

• Migrated S3 implementation from rust-s3 to rusty-s3 (sans-IO signing + reqwest HTTP)
  • s3_bucket() now returns S3Bucket instead of rust_s3::Bucket
  • s3_stats() now returns S3ObjectMetadata instead of rust_s3::serde_types::HeadObjectResult
  • Removed re-export of rust-s3 types; all S3 types are now owned by oneio
• s3_list() keeps returning Vec<String> for backward compatibility

Changed

• S3 operations now use the same reqwest HTTP client as HTTP operations (no duplicate HTTP stack)
• Single PUT uploads for files smaller than the multipart threshold (default: 5MB)
• Multipart uploads use 8MB chunks with auto-calculated part sizing for very large files
• S3Config is now a public type with endpoint/region fields
• Added ONEIO_S3_MULTIPART_THRESHOLD environment variable to configure when to use multipart upload (default: 5MB, the S3 minimum part size)

Bug fixes

• Fixed s3_copy() to use AWS Signature V4 Authorization header for S3-compatible services like R2
• Fixed digest command to work with remote URLs (HTTP, HTTPS, FTP, S3)
• Fixed s3_list() to decode URL-encoded keys returned by ListObjectsV2
• Fixed oneio s3 list CLI flag parsing by removing the -d short-flag collision