fix(ci): JsonSlurper → JsonSlurperClassic 修复 CPS 序列化问题

Jenkins CPS 要求所有变量可序列化，JsonSlurper 返回的 LazyMap 不满足。

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

Jenkinsfile

@@ -74,7 +74,7 @@ pipeline {
       steps {
         withCredentials([string(credentialsId: 'ACR_PASSWORD', variable: 'ACR_PASS')]) {
           script {
-            def serviceVersions = new groovy.json.JsonSlurper().parseText(env.SERVICE_VERSIONS_JSON)
+            def serviceVersions = new groovy.json.JsonSlurperClassic().parseText(env.SERVICE_VERSIONS_JSON)
             for (entry in serviceVersions) {
               def svc = entry.key
               def ver = entry.value
@@ -107,7 +107,7 @@ pipeline {
         lock('prod-deploy') {
           withCredentials([sshUserPrivateKey(credentialsId: 'PROD_SSH_KEY', keyFileVariable: 'SSH_KEY')]) {
             script {
-              def serviceVersions = new groovy.json.JsonSlurper().parseText(env.SERVICE_VERSIONS_JSON)
+              def serviceVersions = new groovy.json.JsonSlurperClassic().parseText(env.SERVICE_VERSIONS_JSON)
               for (entry in serviceVersions) {
                 def svc = entry.key
                 def latestImage = "${ACR_REGISTRY}/${ACR_NAMESPACE}/${svc}:latest"
@@ -163,7 +163,7 @@ print('versions.json updated, platformVersion=' + d.get('platformVersion', ''))
     stage('Commit Versions') {
       steps {
         script {
-          def serviceVersions = new groovy.json.JsonSlurper().parseText(env.SERVICE_VERSIONS_JSON)
+          def serviceVersions = new groovy.json.JsonSlurperClassic().parseText(env.SERVICE_VERSIONS_JSON)
           def versionFiles = serviceVersions.keySet().collect { "VERSION.${it}" }.join(' ')
           def summary = serviceVersions.collect { svc, ver -> "${svc}=${ver}" }.join(', ')
           bat """
@@ -182,7 +182,7 @@ print('versions.json updated, platformVersion=' + d.get('platformVersion', ''))
   post {
     success {
       script {
-        def serviceVersions = new groovy.json.JsonSlurper().parseText(env.SERVICE_VERSIONS_JSON ?: '{}')
+        def serviceVersions = new groovy.json.JsonSlurperClassic().parseText(env.SERVICE_VERSIONS_JSON ?: '{}')
         def summary = serviceVersions.collect { svc, ver -> "${svc}:${ver}" }.join(', ')
         bat "chcp 65001 >nul && echo ✅ 构建部署成功 — ${summary}"
       }