fix(pi): verify Linux compatibility executable

tests/unit/pi-product-artifact.test.ts

@@ -94,6 +94,8 @@ describe('final Pi product artifact verification', () => {
   });
 
   it('uses final unpacked-product paths and strictly parses verifier options', () => {
+    expect(defaultProductExecutable('/repo', 'linux'))
+      .toBe(path.resolve('/repo', 'release', 'linux-unpacked', 'niancode'));
     expect(defaultProductExecutable('D:\\repo', 'win32'))
       .toBe(path.resolve('D:\\repo', 'release', 'win-unpacked', 'Makelore.exe'));
     expect(parsePiArtifactVerifierArgs([