Fix pro activation (#602)

- Only randomize uuid for personal licenses
- Add warning annotation for license activation retries
- add `engineExitCode` output
- repo/code cleanup

src/model/output.ts

@@ -8,6 +8,10 @@ class Output {
   static async setAndroidVersionCode(androidVersionCode: string) {
     core.setOutput('androidVersionCode', androidVersionCode);
   }
+
+  static async setEngineExitCode(exitCode: number) {
+    core.setOutput('engineExitCode', exitCode);
+  }
 }
 
 export default Output;