Check for coverage output

.gitea/workflows/test.yaml

@@ -48,6 +48,13 @@ jobs:
             arbeitszeitmessung-
       - name: Run Go Tests
         run: cd Backend && mkdir .test && go test ./... -coverprofile=.test/coverage.out -json > .test/report.json
+      - name: Verify coverage report exists
+        run: |
+          if [ -f "Backend/.test/coverage.out" ]; then
+            echo "Coverage report found"
+          else
+            echo "Coverage report not found"
+          fi
       - uses: SonarSource/sonarqube-scan-action@v6
         env:
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}