* Fix: Add delimiter support to ListObjectVersions with proper truncation
- Implemented delimiter support to group keys into CommonPrefixes
- Fixed critical truncation bug: now merges versions and common prefixes into single sorted list before truncation
- Ensures total items never exceed MaxKeys (prevents infinite pagination loops)
- Properly sets NextKeyMarker and NextVersionIdMarker for pagination
- Added integration tests in test/s3/versioning/s3_versioning_delimiter_test.go
- Verified behavior matches S3 API specification
* Fix: Add delimiter support to ListObjectVersions with proper truncation
- Implemented delimiter support to group keys into CommonPrefixes
- Fixed critical truncation bug: now merges versions and common prefixes before truncation
- Added safety guard for maxKeys=0 to prevent panics
- Condensed verbose comments for better readability
- Added robust Go integration tests with nil checks for AWS SDK pointers
- Verified behavior matches S3 API specification
- Resolved compilation error in integration tests
- Refined pagination comments and ensured exclusive KeyMarker behavior
- Refactored listObjectVersions into helper methods for better maintainability
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