- Add isValidBucketName validation function for [a-z0-9_-] characters - Validate bucket name characters match ARN parsing regex - Fix error handling in WithFilerClient closure - properly check for lookup errors - Add error handling for json.Marshal calls (metadata and tags) - Improve error messages and logging
- Move ARN parsing, path helpers, and metadata structures to utils.go - Extract all extended attribute and filer operations to filer_ops.go - Reduces code duplication and improves modularity - Improves code organization and maintainability