Add IddCx header location debug step to CI workflows

Introduces a PowerShell step in both build-and-sign-sequential and ci-validation workflows to output and verify the location of the IddCx header in the Windows SDK. This aids in diagnosing SDK path issues during CI runs.

Author: itsmikethetech

.github/workflows/build-and-sign-sequential.yml

@@ -84,6 +84,19 @@ jobs:
         Write-Output "Using WindowsTargetPlatformVersion: $sdkVersion"
         "WINDOWS_SDK_DIR=$kitsRoot" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
         "WINDOWS_TARGET_PLATFORM_VERSION=$sdkVersion" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
+    - name: Debug IddCx header location
+      shell: pwsh
+      run: |
+        $ErrorActionPreference = "Continue"
+        $base = Join-Path $env:WINDOWS_SDK_DIR ("Include\" + $env:WINDOWS_TARGET_PLATFORM_VERSION + "\um\iddcx")
+        Write-Output "IddCx base: $base"
+        if (Test-Path $base) {
+          Get-ChildItem -Path $base -Directory -ErrorAction SilentlyContinue | ForEach-Object { Write-Output ("- " + $_.Name) }
+          Get-ChildItem -Path $base -Recurse -Filter "IddCx.h" -ErrorAction SilentlyContinue | Select-Object -First 20 | ForEach-Object { Write-Output ("Found: " + $_.FullName) }
+        } else {
+          Write-Output "IddCx base directory not found."
+        }
         
     - name: Setup .NET
       uses: actions/setup-dotnet@v4

.github/workflows/ci-validation.yml

@@ -72,6 +72,19 @@ jobs:
         "WINDOWS_SDK_DIR=$kitsRoot" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
         "WINDOWS_TARGET_PLATFORM_VERSION=$sdkVersion" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
 
+    - name: Debug IddCx header location
+      shell: pwsh
+      run: |
+        $ErrorActionPreference = "Continue"
+        $base = Join-Path $env:WINDOWS_SDK_DIR ("Include\" + $env:WINDOWS_TARGET_PLATFORM_VERSION + "\um\iddcx")
+        Write-Output "IddCx base: $base"
+        if (Test-Path $base) {
+          Get-ChildItem -Path $base -Directory -ErrorAction SilentlyContinue | ForEach-Object { Write-Output ("- " + $_.Name) }
+          Get-ChildItem -Path $base -Recurse -Filter "IddCx.h" -ErrorAction SilentlyContinue | Select-Object -First 20 | ForEach-Object { Write-Output ("Found: " + $_.FullName) }
+        } else {
+          Write-Output "IddCx base directory not found."
+        }
+
     - name: Setup Node.js
       uses: actions/setup-node@v4
       with: