fix(ci): make release retryable

ci/release-windows.ps1

@@ -101,11 +101,19 @@ function Publish-Package([string]$Role, [string]$BinaryDirectory) {
     foreach ($file in @($archive, $checksumPath)) {
         $name = Split-Path -Leaf $file
         $url = "$giteaBase/api/packages/justme/generic/monitor-node/$version/$name"
-        & curl.exe --fail-with-body --retry 3 --netrc-file $netrc --upload-file $file $url
+        $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."
         }
-        Write-Output "uploaded Gitea package $name"
+        if ($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 {
+            throw "Gitea package upload failed for $name (HTTP $status)."
+        }
     }
 }