fix opt 6 exit not working

also continue fix attempt on sheepit not starting

unified_sheepit_launcher.ps1

@@ -402,8 +402,11 @@ New-Item -ItemType Directory -Path `$logsRoot -Force | Out-Null
 New-Item -ItemType Directory -Path `$stateRoot -Force | Out-Null
 `$logPath = Join-Path `$logsRoot 'worker.log'
 `$commandPath = Join-Path `$stateRoot 'commands.txt'
+`$payloadPath = Join-Path `$stateRoot 'payload.ps1'
+`$payloadBase64Path = Join-Path `$stateRoot 'payload.b64'
 if (-not (Test-Path `$logPath)) { New-Item -Path `$logPath -ItemType File -Force | Out-Null }
 if (-not (Test-Path `$commandPath)) { New-Item -Path `$commandPath -ItemType File -Force | Out-Null }
+[IO.File]::WriteAllText(`$payloadBase64Path, `$payloadBase64, [System.Text.Encoding]::UTF8)
 `$metaPath = Join-Path `$instanceRoot 'state\worker-info.json'
 `$controllerPath = Join-Path `$dataRoot 'controller.ps1'
 
@@ -437,7 +440,7 @@ if (`$shouldStart) {
         LastExitCode  = `$null
         LogPath       = `$logPath
         CommandPath   = `$commandPath
-        PayloadPath   = `$null
+        PayloadPath   = `$payloadPath
         UpdatedAtUtc  = (Get-Date).ToUniversalTime()
     } | ConvertTo-Json -Depth 5
     `$initialMeta | Set-Content -Path `$metaPath -Encoding UTF8
@@ -455,7 +458,7 @@ if (`$shouldStart) {
         '-File',"`$controllerPath",
         '-WorkerName',"`$workerName",
         '-WorkerType',"`$workerType",
-        '-PayloadBase64',"`$payloadBase64"
+        '-PayloadBase64Path',"`$payloadBase64Path"
     )
 
     Start-Process -FilePath `$psExe -ArgumentList `$controllerArgs -WindowStyle Hidden | Out-Null
@@ -767,7 +770,11 @@ while ($true) {
     Write-Host "5. Quit all workers" -ForegroundColor Yellow
     Write-Host "6. Exit" -ForegroundColor Yellow
 
-    $choice = Read-Host "Select option (1-3)"
+    $choice = Read-Host "Select option (1-6)"
+
+    if ($choice -eq '6') {
+        break
+    }
 
     switch ($choice) {
         '1' { Select-SheepItWorker }
@@ -775,7 +782,6 @@ while ($true) {
         '3' { Send-SheepItCommandAll -CommandText 'pause' }
         '4' { Send-SheepItCommandAll -CommandText 'resume' }
         '5' { Send-SheepItCommandAll -CommandText 'quit' }
-        '6' { break }
         default {
             Write-Host "Invalid selection." -ForegroundColor Red
             Start-Sleep -Seconds 1