The JVM extractor used RandomAccessFileInStream for multi-part RAR archives,
which only provides a single file stream. 7z-JBinding requires
VolumedArchiveInStream to access additional volume parts via callback.
Added RAR_MULTIPART_RE and RAR_OLDSPLIT_RE patterns to detect multi-volume
RAR archives and route them through VolumedArchiveInStream, fixing
"Archive file can't be opened with any of the registered codecs" errors.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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