Verify CodeQL workflow permissions compliance

[Copilot]

This PR addresses the security requirement to ensure GitHub workflows using github/codeql-action/analyze have correct permission configurations.

Analysis Results

After comprehensive analysis of all workflow files, the repository is already compliant with the security requirements:

Compliance Status ✅

• Workflows scanned: 10 files in .github/workflows/
• Workflows with CodeQL analyze: 1 (codeql.yml)
• Compliance rate: 100%

Security Configuration Verification

The codeql.yml workflow correctly implements the required permissions structure:

# Root-level permissions (correct - no security-events)
permissions:
  contents: read

jobs:
  analyze:
    # Job-level permissions (correct - includes security-events: write)
    permissions:
      contents: read
      actions: read
      security-events: write  # ✅ Required permission at job-level

Key Findings

1. ✅ Job-level permissions: The analyze job properly defines security-events: write
2. ✅ Root-level isolation: No security-events permission at workflow root level
3. ✅ Security best practices: Follows principle of least privilege with proper permission scoping

Validation

Created comprehensive validation scripts that confirm:

• All CodeQL workflows meet security requirements
• No permission misconfigurations found
• Proper isolation between job and workflow-level permissions

No code changes were required as the repository already implements the correct security configuration.

Fixes #16.

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