Replace global analyzer suppressions with DynamicallyAccessedMembers attribute

[Copilot]

YamlDotNet deserializer DTOs triggered false positives from SonarAnalyzer (S3459: unassigned properties, S1144: unused setters) because the analyzer doesn't understand reflection-based property access.

Changes

• Added [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties)] to YamlDocument, YamlSection, YamlRequirement, and YamlMapping classes
• Replaced global .globalconfig suppressions with targeted [SuppressMessage] attributes on each DTO class
• Removed .globalconfig file entirely

Before

// .globalconfig suppressed S3459 and S1144 globally

private sealed class YamlDocument
{
    public List<YamlSection>? Sections { get; set; }
}

After

[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties)]
[SuppressMessage("SonarAnalyzer.CSharp", "S3459:Unassigned members should be removed", 
    Justification = "Properties are set by YamlDotNet deserializer via reflection")]
[SuppressMessage("SonarAnalyzer.CSharp", "S1144:Unused private types or members should be removed", 
    Justification = "Properties are accessed by YamlDotNet deserializer via reflection")]
private sealed class YamlDocument
{
    public List<YamlSection>? Sections { get; set; }
}

The DynamicallyAccessedMembers attribute improves Native AOT/trimming support while targeted suppressions provide better maintainability than global rules.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[Feature]: Resolve YamlDotNet serialization warnings</issue_title>
<issue_description>### Problem Statement

Properties written by YamlDotNet deserialization are reported as unused because the static analyzer does not know about how YamlDotNet accesses them.

Proposed Solution

Consider using the [DynamicallyAccessedMembers] attribute rather than the .globalconfig disabling of warnings.

Alternatives Considered

No response

Additional Context

No response

Priority

None

Contribution

• I would be willing to submit a PR for this feature

Code of Conduct

• I agree to follow this project's Code of Conduct</issue_description>

Comments on the Issue (you are @copilot in this section)

Custom agent used: Software Quality Enforcer
Expert agent for code quality, testing standards, code reviews, security analysis, and ensuring adherence to coding conventions

• Fixes [Feature]: Resolve YamlDotNet serialization warnings #46

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