[foursecondfivefour]

Summary

• Add differential tests comparing Python and C++ validation, extraction, patterns and repacking on synthetic archives, including malformed metadata, corrupted streams and unsafe paths.
• Document the coverage and its limitations.
• Remove the one-off alpha-release upload workflow and restore read-only workflow permissions; retain CI build artifacts.

Checks

• All nine CTest suites passed locally on Linux, including the new compatibility tests.
• Windows CI and original F.E.A.R. archives still need validation for these changes.

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