Fix Windows artifact naming in desktop packaging

- Fix the naming convention in Electron output to align with previous
  artifact naming to not break external/internal URLs.
- In desktop execution tests, make artifact locator logic stricter to
  test regression.

scripts/check-desktop-runtime-errors/app/extractors/common/extraction-result.ts

@@ -0,0 +1,4 @@
+export interface ExtractionResult {
+  readonly appExecutablePath: string;
+  readonly cleanup?: () => Promise<void>;
+}