Issue Description

Multiple PowerShell scripts define nearly identical logging functions that support GitHub Actions, Azure DevOps, and console output formats. Write-PinningLog in scripts/security/Test-DependencyPinning.ps1 and Write-SecurityLog in scripts/security/Test-SHAStaleness.ps1 share the same structure and should be consolidated into a single shared function in scripts/linting/Modules/LintingHelpers.psm1.

Additional Context

Current duplication:

• Test-DependencyPinning.ps1:Write-PinningLog (~25 lines)
• Test-SHAStaleness.ps1:Write-SecurityLog (~25 lines)

Recommended approach:

1. Add Write-ScriptLog to LintingHelpers.psm1 with -Level (Info/Warning/Error/Debug) and -OutputFormat (github/azdo/console) parameters
2. Update both security scripts to import and use the shared function
3. Remove the duplicate local functions

Testing:

• Run npm run pester to verify existing tests pass
• Manually verify output formatting in GitHub Actions workflow