🧪 Add test for JsonUtils.jsonStrToList

[LeanBitLab]

🎯 What: The testing gap addressed
This PR addresses the lack of unit tests for JsonUtils.jsonStrToList(), a utility function that converts a JSON string representation into a List<Object>.

📊 Coverage: What scenarios are now tested
The new JsonUtilsTest covers the following scenarios:

• testJsonStrToList_validList: Parsing a valid JSON array of objects correctly.
• testJsonStrToList_emptyString: Handling an empty string gracefully.
• testJsonStrToList_emptyArray: Handling an empty JSON array [] gracefully.
• testJsonStrToList_invalidName: Skipping gracefully over unrecognized property names in the JSON objects.
• testJsonStrToList_malformedJson: Ensuring that structurally malformed JSON input returns an empty list without throwing an unhandled exception.

✨ Result: The improvement in test coverage
The JsonUtils.jsonStrToList() method is now fully covered by unit tests, ensuring that future refactoring will not introduce regressions and that standard/edge cases are properly handled.

---

PR created automatically by Jules for task 1770694567185360950 started by @LeanBitLab

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.