feat: add SonarQube analysis stage to pipeline

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

Jenkinsfile

@@ -81,6 +81,28 @@ pipeline {
             }
         }
 
+        stage('SonarQube Analysis') {
+            agent {
+                docker {
+                    image 'sonarsource/sonar-scanner-cli:latest'
+                    args '-u root'
+                }
+            }
+            steps {
+                echo "🔍 Analyse SonarQube..."
+                withSonarQubeEnv('SonarQube') {
+                    sh """
+                        sonar-scanner \
+                            -Dsonar.projectKey=the-tip-top-backend \
+                            -Dsonar.projectName='Thé Tip Top Backend' \
+                            -Dsonar.sources=. \
+                            -Dsonar.exclusions=node_modules/**,coverage/**,dist/** \
+                            -Dsonar.javascript.lcov.reportPaths=coverage/lcov.info
+                    """
+                }
+            }
+        }
+
         stage('Build Docker image') {
             steps {
                 echo "🐳 Construction de l’image Docker backend..."