feat(s3): support metadata extensions for bucket listings

[weisd]

Type of Change

• New Feature
• Bug Fix
• Documentation
• Performance Improvement
• Test/CI
• Refactor
• Other:

Related Issues

Summary of Changes

• update the s3s dependency to include the metadata extension handlers for bucket object listings and version listings
• wire the new listing paths through the RustFS access, storage, and usecase layers
• return user metadata, user tags, and internal erasure information in the extension responses
• add unit and request-level e2e coverage for both listing extensions

Checklist

• I have read and followed the CONTRIBUTING.md guidelines
• Passed make pre-commit
• Added/updated necessary tests
• Documentation updated (if needed)
• CI/CD passed (if applicable)

Impact

• Breaking change (compatibility)
• Requires doc/config/deployment update
• Other impact:
  Adds metadata fields to the extension responses for bucket object listings and version listings.

Additional Notes

Verification commands:

cargo fmt --all --check
cargo clippy --workspace --all-features --all-targets -- -D warnings
cargo test -p rustfs list_object_versions -- --nocapture
cargo test -p rustfs list_objects_v2m -- --nocapture
cargo test -p rustfs test_phase5_s3_entrypoints_delegate_to_usecases -- --nocapture
cargo test -p e2e_test test_list_object_versions_metadata_extension_returns_metadata_tags_and_internal -- --nocapture
cargo test -p e2e_test test_list_objects_v2_metadata_extension_returns_metadata_tags_and_internal -- --nocapture
cargo test -p e2e_test list_object_versions -- --nocapture
cargo test -p e2e_test list_objects_v2 -- --nocapture
make pre-commit

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA ba268d7.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

Scanned Files

None