Exclude test classes from CommentDefaultAccessModifier rule

[devin-ai-integration]

Exclude test classes from CommentDefaultAccessModifier PMD rule

Summary

Adds a violationSuppressXPath property to the CommentDefaultAccessModifier rule in pmd7-rules.xml to suppress all violations inside test classes. This resolves the existing TODO comment ("ignore constructors of test classes") by excluding test classes entirely.

The XPath matches classes using the same naming pattern already defined in the ClassNamingConventions rule: Test*, IT*, *Test, *Tests, *TestCase, *IT, *ITCase.

The previous approach only ignored specific test-related annotations (e.g. @Test, @BeforeEach). This change broadens the exclusion to cover everything inside a test class — including fields, constructors, and helper methods that lack those annotations.

Review & Testing Checklist for Human

• Verify XPath AST node names are correct for PMD 7: The expression uses ClassDeclaration and @SimpleName, which are PMD 7 AST names (PMD 6 used ClassOrInterfaceDeclaration / @Image). Confirm these are valid for PMD 7.22.0.
• Test against an actual project: Run PMD with this ruleset against a project that has test classes with default-access members to confirm violations are actually suppressed. CI alone may not cover this.
• Check if the broad exclusion is desired: ancestor-or-self::ClassDeclaration means nested classes inside test classes are also excluded. Verify this is the intended behavior.
• Verify test class name pattern coverage: Confirm the regex covers all test class naming conventions used across your codebase (currently: ^(Test|IT).*$|^[A-Z][a-zA-Z0-9]*Test(s|Case)?$|^[A-Z][a-zA-Z0-9]*IT(Case)?$).

Notes

• Could not run Maven locally to functionally verify the rule change — only validated XML syntax.
• Devin Session
• Requested by: @lithium147

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✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

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