Expose Cognitive Complexity metrics in GitLab-visible JUnit XML fields

[fabian-barney]

Summary

• add GitLab-visible cognitive complexity details to JUnit testcase names
• add testcase-level system-out diagnostics while preserving existing JUnit properties and failure body text
• update formatter tests, CLI report assertions, and README documentation

Validation

• mvn -B -ntp -P!quality-gates-all -pl core '-Dtest=CliApplicationTest,ReportFormatterTest' test
• mvn -B -ntp -P!quality-gates-all verify

Closes #85

[Copilot]

Pull request overview

This PR adjusts the JUnit XML formatter so GitLab’s Tests UI can display Cognitive Complexity details by moving key metric data into GitLab-parsed fields (testcase@name and testcase-level system-out) while preserving existing JUnit properties and failure body diagnostics.

Changes:

• Embed cognitive complexity in JUnit testcase name as method:lineStart [CC=complexity].
• Add testcase-level system-out containing the full diagnostic text (complexity, threshold, source range, method).
• Update formatter/CLI tests and README to match the new JUnit XML shape.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
README.md	Documents the new GitLab-visible JUnit testcase name and testcase-level system-out behavior.
core/src/test/java/media/barney/cognitive/core/ReportFormatterTest.java	Updates JUnit formatting assertions for the new testcase naming and system-out diagnostics.
core/src/test/java/media/barney/cognitive/core/CliApplicationTest.java	Updates CLI JUnit-sidecar assertions to expect CC in testcase names.
core/src/main/java/media/barney/cognitive/core/ReportFormatter.java	Implements updated JUnit testcase naming, adds testcase-level system-out, and reuses diagnostic text for failure bodies.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.