feat: 全系统优化 — 并发控制 + 冗余清理 + 数据流修复 + 全面测试

核心修复:
- 状态机加 SELECT FOR UPDATE 行锁，消除并发竞态
- hss_md_staff 加 role 列，登录从数据库读取真实角色
- 申请重复校验排除自身，全流程 20 步闭环通过
- 派单 SQL 修复 + 支付状态机过渡 + 完成服务 plan_item_id 修复

并发控制新增:
- RedisLockService (SET NX PX + Lua 安全解锁)
- RateLimiterService (Redis 滑动窗口 + API 拦截器)
- TransactionIsolationConfig (SERIALIZABLE for 支付回调)
- MqttPublisher (异步队列 + JDK TCP 探测)
- ObjectStorageService (AWS SigV4 预签名, 纯 JDK)

冗余清理:
- 删除 6 个死代码文件 (~620 行)
- hutool-all → JDK MessageDigest, 去 MapStruct, 去 jsr310
- haversine 提取到 GeoUtil, count/round 提取到 JdbcUtil
- 创建 platform layout 组件

前端修复:
- 登录页移除角色选择器, 由后端 JWT 返回
- 移除 ClientOnly 包裹, 页面正常渲染
- SPA fallback Nginx 配置修复

Docker: 运行时镜像 eclipse-temurin:17-jre-jammy (缩小 ~300MB)

文档: 新增系统实现与修复报告.md

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

hss-home-service/website/tests/load/k6-stress-test.js

@@ -0,0 +1,32 @@
+import http from 'k6/http';
+import { check, sleep } from 'k6';
+
+const API = 'http://172.31.12.249:18080/api/hss';
+const H = { 'Content-Type': 'application/json', 'X-Tenant-Id': '1', 'X-Org-Id': '1', 'X-User-Role': 'ADMIN' };
+
+// Stress test: 50 concurrent users creating applications
+export const options = {
+  scenarios: {
+    create_applications: {
+      executor: 'constant-arrival-rate',
+      rate: 10,          // 10 requests per second
+      timeUnit: '1s',
+      duration: '30s',
+      preAllocatedVUs: 50,
+      maxVUs: 100,
+    },
+  },
+  thresholds: {
+    http_req_duration: ['p(95)<3000', 'p(99)<5000'],
+    http_req_failed: ['rate<0.10'],
+  },
+};
+
+export default function () {
+  const idemKey = 'stress-' + __VU + '-' + __ITER + '-' + Date.now();
+  const r = http.post(API + '/applications', JSON.stringify({
+    patientId: '2001', serviceType: 'HOME_CARE', channel: 'WECHAT',
+    contactName: 'Stress', contactPhone: '13800000000', address: '梅江区', regionCode: '441402001'
+  }), { headers: { ...H, 'Idempotency-Key': idemKey } });
+  check(r, { 'create 200': (r) => r.status === 200 });
+}