The solution GlobalSection only declares Release|x86 and Release|x64.
Passing Platform=Win32 to msbuild with a .sln target is invalid and causes:
MSB4126: The specified solution configuration 'Release|Win32' is invalid.
Add sln_platform (x86/x64) used only for the .sln invocation; keep
Platform=Win32 for the Zydis vcxproj build and the output path lookup
(vcxproj maps x86->Win32 for its OutDir so finder_plat=Win32 stays correct).
Affects both build-offsetfinder.yml and build-and-release.yml.