- Modified GZipFilePart to only access stream.Position when stream.CanSeek is true
- Modified GZipArchiveEntry.OpenEntryStream to check CanSeek before accessing Position
- Added test case GZip_Archive_NonSeekableStream to verify non-seekable stream support
- All existing tests pass
Co-authored-by: adamhathcock <527620+adamhathcock@users.noreply.github.com>