v0.4.2-alpha

Fix the Windows dependency walk used by source setup packaging: BcryptPrimitives.dll and ntdll.dll are Windows OS dependencies. The native analyzer now stages successfully without treating those system libraries as missing application DLLs. The staged-SDK regression invokes the real dependency walker.

This includes v0.4.1-alpha's native-analyzer staging and SDK smoke checks, and v0.4.0-alpha's generation recipes, computed-return fix, and bounded coverage tooling. Game setup packs generate with their bundled Python and C/C++ tools; Rust is required on the packaging host, rather than the player's machine.

Validation: two integration regressions, Windows extracted setup generation with Cargo excluded from PATH, a complete rebuild with the bundled Clang/Python toolchain, Linux/Windows/macOS CI, and the extracted self-contained Windows CLI smoke test. Four-platform game setup artifacts are checked separately before their releases.