feature: split sonar action from pr action

.github/workflows/pull-request_backend.yml

@@ -73,6 +73,55 @@ jobs:
       - name: Run unit & integration tests
         run: mvn -pl tx-models,tx-backend,tx-coverage -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn -B verify
 
+  Sonar:
+    needs: Test
+    permissions:
+      checks: write
+      pull-requests: write
+    runs-on: ubuntu-latest
+    if: success()
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '${{ env.JAVA_VERSION }}'
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Publish integration test results
+        uses: EnricoMi/publish-unit-test-result-action@v2
+        if: always()
+        with:
+          files: "${{ github.workspace }}/tx-backend/target/failsafe-reports/TEST-*.xml"
+          check_name: "Integration Test Results"
+
+      - name: Publish unit test results
+        uses: EnricoMi/publish-unit-test-result-action@v2
+        if: always()
+        with:
+          files: "**/surefire-reports/TEST-*.xml"
+          check_name: "Unit Test Results"
+
+      - name: Clean working directories
+        run: |
+          rm -rf .scannerwork
+          rm -rf .sonar
+
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v4
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+
+      - name: Verify Sonar Scan
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN_BACKEND  }}
+          SONAR_ORGANIZATION: ${{ vars.SONAR_ORGANIZATION }}
+          SONAR_PROJECT_KEY: ${{ vars.SONAR_PROJECT_KEY_BACKEND }}
+        run: mvn -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn --batch-mode sonar:sonar -Dsonar.coverage.jacoco.xmlReportPaths=${{ github.workspace }}/tx-coverage/target/site/jacoco-aggregate/jacoco.xml -Dsonar.projectKey=${{ vars.SONAR_PROJECT_KEY_BACKEND }} -Dsonar.organization=${{ vars.SONAR_ORGANIZATION }}
+
   Publish-docker-image:
    # needs: [ "Test-and-Sonar" ]
     runs-on: ubuntu-latest