Add Test Audit Report

[Snider]

This submission adds a new file, AUDIT-TESTING.md, which contains a comprehensive audit of the project's testing practices.

The audit covers:

• Coverage Analysis: Line, method, and class coverage are all critically low (under 5%).
• Test Quality: Existing feature tests are decent but lack edge case coverage.
• Missing Tests: There is a complete absence of unit tests, security tests, and integration tests.
• Anti-Patterns: The primary anti-pattern is the lack of unit tests.

The report provides a clear overview of the current state of testing and includes a list of suggested tests to add to improve the quality and reliability of the codebase.

Fixes #42

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PR created automatically by Jules for task 14834329841343032828 started by @Snider

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feature/add-test-audit-report-14834329841343032828

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[github-actions]

QA Pipeline Results

Check	Status	Details
Tests	✓	207 tests, 410 assertions
PHPStan	✓	0 errors
Psalm	✗	0 issues
Code Style	✓	0 files need formatting
Security	✓	0 vulnerabilities

Artifacts

• test-results.xml - JUnit test results
• phpstan.json - PHPStan analysis
• psalm.json / psalm.sarif - Psalm analysis
• pint.json - Code style report
• audit.json - Security audit

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Generated by core php qa pipeline