Fix: Resolve PSScriptAnalyzer warnings (#6)

* fix: resolve PSScriptAnalyzer warnings

* ci: switch codeql analysis from javascript to actions

Repo has no JavaScript; scan the GitHub Actions workflows instead.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Kim Harjamäki <kim.harjamaki@prosimo.fi>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: 3 people

.github/workflows/codeql.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'javascript' ]
+        language: [ 'actions' ]
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4

scripts/validate.ps1

@@ -50,5 +50,5 @@ finally {
     Pop-Location
 }
 
-Write-Host 'CAS platform validation passed.'
+Write-Output 'CAS platform validation passed.'
 

tests/Infrastructure.Tests.ps1

@@ -1,5 +1,8 @@
+[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
+param()
+
 BeforeAll {
-    $repoRoot = Split-Path -Parent $PSScriptRoot
+    $repoRoot = Split-Path -Parent -Path $PSScriptRoot
     $main = Get-Content -Raw (Join-Path $repoRoot 'infra/main.bicep')
     $compute = Get-Content -Raw (Join-Path $repoRoot 'infra/modules/container-apps.bicep')
     $observability = Get-Content -Raw (Join-Path $repoRoot 'infra/modules/observability.bicep')