feat(customer): 新增ICC客户信息同步功能 - OAuth2密码模式鉴权拉取org_base客户、按icc_code幂等upsert写入并记录icc_sync_log，注册每10分钟定时任务；客户档案管理页新增手动'同步客户'按钮（POST /api/customers/sync/icc），同步后自动刷新列表与统计；customer表新增icc_code字段及唯一索引，同步db_seed与设计文档

server/yarn.lock

@@ -4537,6 +4537,11 @@ undici-types@~6.21.0:
   resolved "https://registry.npmmirror.com/undici-types/-/undici-types-6.21.0.tgz"
   integrity sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==
 
+undici@^8.12.2:
+  version "8.12.2"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-8.12.2.tgz#e869237430adcc5de6bca798c94edd7db9dac5ac"
+  integrity sha512-XtuDWVdqTLr3NAxm2ly9/hU6kUsJOgGh1RASzMBbsw6aWCOaQzHdW+QQDfdERjfJ2V5vL5pRPa4RetO9UfivDg==
+
 universalify@^0.1.0:
   version "0.1.2"
   resolved "https://registry.npmmirror.com/universalify/-/universalify-0.1.2.tgz"