⚙️ [Maintenance]: Refactor test result aggregation script

[MariusStorhaug]

Summary

Refactors Get-AggregatedStatus.ps1 to align with the improved implementation pattern used in Invoke-Pester/tests/Test-ActionResults.ps1.

Changes

Refactored

• Test aggregation script: Restructured to use cleaner data patterns and improved code organization

Details

• Added proper script header with comment-based help, [CmdletBinding()], and param()
• Replaced pre-computed variables with nested hashtable structure (@{ Actual = ...; Expected = ... })
• Separated job data from presentation by processing into a $results array with computed pass values
• Changed iteration from ForEach-Object to foreach for better readability
• Changed Write-Warning to Write-Error for actual validation failures
• Removed redundant debug statements
• Added | Out-String to Format-List for proper output
• Updated summary table to use $results instead of raw $jobs

Type of Change

• ⚙️ Maintenance - Test infrastructure improvements