Run Python smoke code in AppContainer

SovereignAI-Starter/scripts/run_appcontainer_probe.ps1

@@ -11,6 +11,7 @@ $outputDir = Join-Path $env:TEMP ("SovereignAI-AppContainer-" + [guid]::NewGuid(
 New-Item -ItemType Directory -Path $outputDir | Out-Null
 $exe = Join-Path $outputDir 'appcontainer_probe.exe'
 $obj = Join-Path $outputDir 'appcontainer_probe.obj'
+$previousPythonHome = $env:SOVEREIGNAI_PYTHON_HOME
 
 try {
     Push-Location $repoRoot
@@ -21,6 +22,11 @@ try {
             throw "C++ probe compilation failed with exit code $LASTEXITCODE"
         }
 
+        $pythonHome = (& python -c 'import sys; print(sys.base_prefix)').Trim()
+        if ($LASTEXITCODE -ne 0 -or -not (Test-Path -LiteralPath $pythonHome -PathType Container)) {
+            throw 'Could not locate the active Python runtime to test isolated Python execution.'
+        }
+        $env:SOVEREIGNAI_PYTHON_HOME = $pythonHome
         & $exe
         $probeExit = $LASTEXITCODE
         if ($probeExit -ne 0) {
@@ -30,6 +36,11 @@ try {
         Pop-Location
     }
 } finally {
+    if ($null -eq $previousPythonHome) {
+        Remove-Item Env:SOVEREIGNAI_PYTHON_HOME -ErrorAction SilentlyContinue
+    } else {
+        $env:SOVEREIGNAI_PYTHON_HOME = $previousPythonHome
+    }
     $resolvedOutput = (Resolve-Path -LiteralPath $outputDir -ErrorAction SilentlyContinue).Path
     $tempRoot = [IO.Path]::GetFullPath($env:TEMP).TrimEnd('\') + '\'
     if ($resolvedOutput -and $resolvedOutput.StartsWith($tempRoot, [StringComparison]::OrdinalIgnoreCase) -and