Convert Cobertura to SonarQube generic coverage XML via reportgenerator

Co-authored-by: 304NotModified <5808377+304NotModified@users.noreply.github.com>

Author: Copilot

.github/workflows/sonarcloud.yml

@@ -24,7 +24,9 @@ jobs:
           dotnet-version: 10.0.x
 
       - name: Install SonarScanner for .NET
-        run: dotnet tool install --global dotnet-sonarscanner
+        run: |
+          dotnet tool install --global dotnet-sonarscanner
+          dotnet tool install --global dotnet-reportgenerator-globaltool
 
       - name: Restore dependencies
         run: dotnet restore SLNX-validator.slnx
@@ -38,14 +40,17 @@ jobs:
             /o:"304notmodified" \
             /d:sonar.token="${SONAR_TOKEN}" \
             /d:sonar.host.url="https://sonarcloud.io" \
-            /d:sonar.coverageReportPaths="**/TestResults/**/*.cobertura.xml"
+            /d:sonar.coverageReportPaths="coverage/SonarQube.xml"
 
       - name: Build
         run: dotnet build SLNX-validator.slnx --no-restore -c Release
 
       - name: Test with coverage
         run: dotnet test --solution SLNX-validator.slnx --no-build -c Release --verbosity normal -- --coverage --coverage-output-format cobertura
 
+      - name: Convert coverage to SonarQube format
+        run: reportgenerator -reports:"**/TestResults/**/*.cobertura.xml" -targetdir:coverage -reporttypes:SonarQube
+
       - name: End SonarCloud analysis
         env:
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}