Thread-Safe Enhancement for JUnit 5 Test Extension

I've developed a JUnit 5 test extension aimed at capturing test results. However, this extension is unable to accurately capture data when tests are run in parallel, leading to missing, duplicate, and out-of-order data. The primary focus of this project will be to enhance the accuracy of the results.

Key Requirements:
- Review and modify the current extension to make it thread-safe
- Prioritize the accuracy of captured test results
- Ensuring compatibility and optimal functioning with the JUnit Platform Engine

Ideal Skills:
- Expert understanding of JUnit 5 and its test extensions
- Proven experience in multi-threading and making code thread-safe
- Strong debugging skills to identify and rectify issues in captured data
- Familiarity with JUnit Platform Engine

Your task will be to ensure the extension can reliably capture results during parallel test execution, improving its overall accuracy and dependability.