fix(ci): resolve nupkg glob explicitly before pushing to NuGet

pwsh doesn't expand wildcards for native-command arguments, so
'dotnet nuget push out/*.nupkg' received the literal string
'out/*.nupkg' and failed with 'File does not exist' — none of the
11 successfully packed .nupkg files were pushed. Enumerate the
directory with Get-ChildItem and push each package path explicitly,
matching the Pack step's existing loop idiom.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: tedd

.github/workflows/deploy.yml

@@ -65,4 +65,10 @@ jobs:
         }
 
     - name: Push to NuGet
-      run: dotnet nuget push out/*.nupkg -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json --skip-duplicate
+      shell: pwsh
+      run: |
+        $packages = Get-ChildItem -Path out -Filter *.nupkg
+        foreach ($pkg in $packages) {
+          dotnet nuget push $pkg.FullName -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json --skip-duplicate
+          if ($LASTEXITCODE -ne 0) { exit 1 }
+        }