fix: 将并行部署改为串行部署

- 避免多个 SSH 连接同时建立导致的冲突
- 保持构建阶段的并行，只有部署改为串行

Jenkinsfile

@@ -115,16 +115,11 @@ pipeline {
                 script {
                     def services = env.SERVICES_TO_BUILD.split(',') as List
                     
-                    // 部署也可以并行
-                    def parallelDeploys = [:]
+                    // 串行部署（避免 SSH 连接冲突）
                     services.each { service ->
-                        parallelDeploys[service] = {
-                            deployService(service)
-                        }
+                        deployService(service)
                     }
                     
-                    parallel parallelDeploys
-                    
                     echo "🚀 Deployment completed!"
                 }
             }