Repository consistency and test strategy documentation improvements

[Copilot]

Pull Request

Description

Comprehensive agent analysis revealed minor deviations from TemplateDotNetTool patterns and insufficient documentation of the multi-stage test execution strategy.

Configuration Improvements

• Linting patterns: Updated .markdownlint-cli2.jsonc to **/AGENT_REPORT_*.md (more precise), added to .cspell.json ignorePaths
• Workflow readability: Added descriptive comments to build.yaml job definitions

Documentation Enhancements

• CONTRIBUTING.md: Documented three-tier test execution strategy (local unit tests, CI self-validation via sonarmark --validate, CI platform matrix tests)
• requirements.yaml: Added header explaining why dotnet reqstream --enforce shows unsatisfied requirements locally - by design, not a defect

The apparent gap in requirements coverage (self-validation and platform tests) is architectural - these execute only in CI. Now explicitly documented to prevent confusion.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code quality improvement

Related Issues

Pre-Submission Checklist

Before submitting this pull request, ensure you have completed the following:

Build and Test

• Code builds successfully: dotnet build --configuration Release
• All tests pass: dotnet test --configuration Release
• Code produces zero warnings

Code Quality

• Code formatting is correct: dotnet format --verify-no-changes
• New code has appropriate XML documentation comments
• Static analyzer warnings have been addressed

Linting

• Markdown linter passes: npx markdownlint-cli2 "**/*.md" "#node_modules"
• Spell checker passes: npx cspell "**/*.{md,cs}" --no-progress
• YAML linter passes: yamllint .

Testing

• Added unit tests for new functionality
• Updated existing tests if behavior changed
• All tests follow the AAA (Arrange, Act, Assert) pattern
• Test coverage is maintained or improved

Documentation

• Updated README.md (if applicable)
• Updated ARCHITECTURE.md (if applicable)
• Added code examples for new features (if applicable)
• Updated requirements.yaml (if applicable)

Additional Notes

CodeQL security scan: 0 alerts. All quality gates passing.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://storage.googleapis.com/chromium-browser-snapshots/Linux_x64/1108766/chrome-linux.zip
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node install.js (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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