fix(saas): P1 审计修复 — 连接池断路器 + Worker重试 + XSS防护 + 状态机SQL解析器

P1 修复内容:
- F7: health handler 连接池容量检查 (80%阈值返回503 degraded)
- F9: SSE spawned task 并发限制 (Semaphore 16 permits)
- F10: Key Pool 单次 JOIN 查询优化 (消除 N+1)
- F12: CORS panic → 配置错误
- F14: 连接池使用率计算修正 (ratio = used*100/total)
- F15: SQL 迁移解析器替换为状态机 (支持 $$, DO $body$, 存储过程)
- Worker 重试机制: 失败任务通过 mpsc channel 重新入队
- DOMPurify XSS 防护 (PipelineResultPreview)
- Admin V2: ErrorBoundary + SWR全局配置 + 请求优化

admin-v2/src/main.tsx

@@ -4,6 +4,7 @@ import { RouterProvider } from 'react-router-dom'
 import { ConfigProvider, App as AntApp } from 'antd'
 import zhCN from 'antd/locale/zh_CN'
 import { router } from './router'
+import { ErrorBoundary } from './components/ErrorBoundary'
 
 const queryClient = new QueryClient({
   defaultOptions: {
@@ -16,11 +17,13 @@ const queryClient = new QueryClient({
 })
 
 createRoot(document.getElementById('root')!).render(
-  <ConfigProvider locale={zhCN}>
-    <AntApp>
-      <QueryClientProvider client={queryClient}>
-        <RouterProvider router={router} />
-      </QueryClientProvider>
-    </AntApp>
-  </ConfigProvider>,
+  <ErrorBoundary>
+    <ConfigProvider locale={zhCN}>
+      <AntApp>
+        <QueryClientProvider client={queryClient}>
+          <RouterProvider router={router} />
+        </QueryClientProvider>
+      </AntApp>
+    </ConfigProvider>
+  </ErrorBoundary>,
 )