OSSystems / compress-tools-rs / 24793798770

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feat: reject ZIP archives with unsupported Deflate64 compression up front

- Add a central-directory preflight that scans ZIP entries for methods libarchive
  cannot decode (currently Deflate64 / method 9) and fails fast with a new
  Error::UnsupportedZipCompression listing the offending entries
- Wire the preflight into list_archive_files, uncompress_archive, and
  ArchiveIterator so the error surfaces before libarchive aborts mid-stream
- Replace AsyncReadWrapper::seek's unreachable!() with ErrorKind::Unsupported
  so the preflight degrades gracefully on unseekable async readers
- Cover the behavior with regression tests and a Deflate64 fixture
- Note the change in CHANGES.md

Closes #136

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