Avoid double-parenthesis in `JpqlQueryBuilder.InPredicate` rendering

[cwangg897]

Summary

There is an explicit // TODO comment in JpqlQueryBuilder.java regarding the parenthesis handling logic. The current implementation includes logic to prevent duplicate parentheses, but it could be improved for better readability and maintainability.

Motivation

• The code section marked with a TODO comment is a clear entry point for open-source contributions.
• Improving the parenthesis handling logic can reduce code complexity and enhance the readability of JPQL query building.
• Addressing this TODO will make future maintenance easier and lower the barrier for other contributors.

Current Behavior

• The logic to prevent duplicate parentheses is somewhat ad-hoc and could lead to confusing or sub-optimal query generation.
• The existing code relies on manual checks that can be refactored for clarity.

Suggested Improvement

• Refactor the parenthesis handling logic to make it more explicit and robust.
• Add unit tests to verify that duplicate parentheses are no longer generated in any edge cases.
• Clean up the code to remove the TODO comment and document the improved behavior.

Impact

• Improved code readability and maintainability in the JPQL query builder.
• Reduced risk of bugs related to query string generation.
• Lower entry barrier for new contributors.

[cwangg897]

Can I Take it?