ci: simplify pipeline — docker build handles full Maven build internally

Remove separate Maven stage. The multi-stage Dockerfile already runs mvn
inside a Linux container, so Windows Jenkins just runs docker build/push.
Server-side docker login pre-configured; deploy only needs docker pull.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Jenkinsfile

@@ -1,5 +1,5 @@
 pipeline {
-  agent none
+  agent any
 
   parameters {
     choice(name: 'SERVICE', choices: ['tenant-service', 'im-service', 'push-service', 'update-service'], description: '要构建的服务模块')
@@ -18,31 +18,11 @@ pipeline {
 
   stages {
     stage('Checkout') {
-      agent any
-      steps {
-        checkout scm
-        stash name: 'source', includes: '**/*'
-      }
-    }
-
-    stage('Build JAR') {
-      agent {
-        docker {
-          image 'maven:3.9-eclipse-temurin-21'
-          args '-v maven-repo:/root/.m2'
-        }
-      }
-      steps {
-        unstash 'source'
-        sh "mvn -pl ${params.SERVICE} -am -DskipTests -q clean package"
-        stash name: 'jar', includes: "${params.SERVICE}/target/*.jar,${params.SERVICE}/Dockerfile,Dockerfile"
-      }
+      steps { checkout scm }
     }
 
     stage('Docker Build & Push') {
-      agent any
       steps {
-        unstash 'jar'
         withCredentials([string(credentialsId: 'ACR_PASSWORD', variable: 'ACR_PASS')]) {
           script {
             def imageName = "${ACR_REGISTRY}/${ACR_NAMESPACE}/${params.SERVICE}:${params.IMAGE_TAG}"
@@ -58,7 +38,6 @@ pipeline {
     }
 
     stage('Deploy to Production') {
-      agent any
       when { expression { return params.DEPLOY } }
       steps {
         withCredentials([sshUserPrivateKey(credentialsId: 'PROD_SSH_KEY', keyFileVariable: 'SSH_KEY')]) {
@@ -66,12 +45,10 @@ pipeline {
             def svcName = params.SERVICE.replace('-service', '')
             def imageName = "${ACR_REGISTRY}/${ACR_NAMESPACE}/${params.SERVICE}:${params.IMAGE_TAG}"
             sh """
-              ssh -i \${SSH_KEY} -o StrictHostKeyChecking=no ${PROD_USER}@${PROD_HOST} "
-                docker pull ${imageName} &&
-                cd /opt/xuqm/deploy &&
-                docker compose -f ${COMPOSE_FILE} up -d --no-deps ${svcName} &&
-                docker image prune -f
-              "
+              ssh -i \${SSH_KEY} -o StrictHostKeyChecking=no ${PROD_USER}@${PROD_HOST} \
+                "docker pull ${imageName} && \
+                 docker compose -f ${COMPOSE_FILE} up -d --no-deps ${svcName} && \
+                 docker image prune -f"
             """
           }
         }