35039 - Fix to enhance JSON parsing to skip non-JSON scalar values (#903)

* 35039 - Fix to enhance JSON parsing to skip non-JSON scalar values and ensure only valid object/array payloads are processed

* Update src/powershell/tests/Test-Assessment.35039.ps1

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/powershell/tests/Test-Assessment.35039.ps1

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: alexandair

src/powershell/tests/Test-Assessment.35039.ps1

@@ -57,9 +57,17 @@ function Test-Assessment-35039 {
                     if ($ruleXml.root) {
                         $valueElements = $ruleXml.root.GetElementsByTagName('value')
                         foreach ($valueElement in $valueElements) {
-                            if (-not [string]::IsNullOrWhiteSpace($valueElement.'#text')) {
+                            $rawValue = $valueElement.'#text'
+                            if (-not [string]::IsNullOrWhiteSpace($rawValue)) {
                                 try {
-                                    $jsonData = $valueElement.'#text' | ConvertFrom-Json
+                                    $jsonText = $rawValue.Trim()
+
+                                    # We only need object/array JSON payloads that can contain Workloads
+                                    if ($jsonText -notmatch '^[\{\[]') {
+                                        continue
+                                    }
+
+                                    $jsonData = $jsonText | ConvertFrom-Json -ErrorAction Stop
                                     if ($jsonData.Workloads -and $jsonData.Workloads -contains 'Copilot') {
                                         $hasCopilotConfig = $true
                                         break