The download is signature/checksum-verified before extraction, so the
per-member path/symlink sanitization was redundant. Extract archives as-is
across all three wrappers (Python, JS, .NET), tar and zip.
- Python: filter="fully_trusted" (pins legacy behavior; 3.14 defaults to
"data"), plain zip extractall
- JS: drop the tar filter callback; inline the one-line extractTar
- .NET: TarFile/ZipFile.ExtractToDirectory; remove orphan ResolveSafeEntryPath
- Drop the obsolete traversal/symlink tests