ci: use bounded runspaces for artifact uploads [CI SKIP]

ci/package-cross-platform.ps1

@@ -111,24 +111,61 @@ consumer install.
         }
     }
 
-    $uploadFiles.ToArray() | ForEach-Object -Parallel {
-        $file = $_
-        $name = Split-Path -Leaf $file
-        $url = "$using:giteaBase/api/packages/justme/generic/monitor-node/$using:version/$name"
-        $status = & curl.exe --silent --show-error --retry 3 --netrc-file $using:netrc --upload-file $file --output NUL --write-out '%{http_code}' $url
-        if ($LASTEXITCODE -ne 0) {
-            throw "Gitea package upload failed for $name."
-        }
-        if ($status -match '^2') {
-            Write-Output "uploaded Gitea package $name"
-        }
-        elseif ($status -eq '409') {
-            Write-Output "Gitea package $name already exists; reusing the existing release file"
-        }
-        else {
+    $uploadScript = @'
+param([string]$File, [string]$Base, [string]$PackageVersion, [string]$Netrc)
+$ErrorActionPreference = 'Stop'
+$name = [IO.Path]::GetFileName($File)
+$url = "$Base/api/packages/justme/generic/monitor-node/$PackageVersion/$name"
+$status = & curl.exe --silent --show-error --retry 3 --netrc-file $Netrc --upload-file $File --output NUL --write-out '%{http_code}' $url
+if ($LASTEXITCODE -ne 0) {
+    throw "Gitea package upload failed for $name (curl exit $LASTEXITCODE)."
+}
+if ($status -match '^2') {
+    "uploaded Gitea package $name"
+}
+elseif ($status -eq '409') {
+    "Gitea package $name already exists; reusing the existing release file"
+}
+else {
     throw "Gitea package upload failed for $name (HTTP $status)."
+}
+'@
+    $runspacePool = [RunspaceFactory]::CreateRunspacePool(1, 8)
+    $runspacePool.Open()
+    $pendingUploads = [System.Collections.Generic.List[object]]::new()
+    try {
+        foreach ($file in $uploadFiles) {
+            $powerShell = [PowerShell]::Create()
+            $powerShell.RunspacePool = $runspacePool
+            [void]$powerShell.AddScript($uploadScript).AddArgument($file).AddArgument($giteaBase).AddArgument($version).AddArgument($netrc)
+            $pendingUploads.Add([pscustomobject]@{ PowerShell = $powerShell; Handle = $powerShell.BeginInvoke() })
+        }
+
+        $uploadErrors = [System.Collections.Generic.List[string]]::new()
+        foreach ($pending in $pendingUploads) {
+            try {
+                foreach ($message in $pending.PowerShell.EndInvoke($pending.Handle)) {
+                    Write-Output $message
+                }
+                foreach ($errorRecord in $pending.PowerShell.Streams.Error) {
+                    $uploadErrors.Add($errorRecord.ToString())
+                }
+            }
+            catch {
+                $uploadErrors.Add($_.Exception.Message)
+            }
+        }
+        if ($uploadErrors.Count -gt 0) {
+            throw "One or more Gitea package uploads failed:`n$($uploadErrors -join "`n")"
+        }
+    }
+    finally {
+        foreach ($pending in $pendingUploads) {
+            $pending.PowerShell.Dispose()
+        }
+        $runspacePool.Close()
+        $runspacePool.Dispose()
     }
-    } -ThrottleLimit 8
 }
 finally {
     Remove-Item -LiteralPath $netrc -Force -ErrorAction SilentlyContinue