Enhance code coverage accuracy and Coveralls integration

[mdapena]

Initial Checks

• The code compiles successfully without any errors or warnings.
• I have personally tested these changes on my local environment.
• I have ensured that relevant documentation has been added or updated.
• I adhere to the project structure and code standards defined in the documentation.
• My code follows the established coding style guidelines.
• I have added tests for the new code (if applicable).
• All existing tests have passed successfully.

Description

This PR focuses on enhancing the accuracy of code coverage metrics and improving the overall workflow in relation to Coveralls.

• The Coveralls badges and release notes have been updated to accurately reflect the current code coverage and highlight the latest code changes and enhancements.
• An issue related to the accuracy of reports and supported formats within the Coveralls workflow has been identified and resolved. The workflow has been updated to convert the .coverage file to XML format, enabling consistent and reliable reporting.