feat(iit): Complete CRA Agent V3.0 P0 milestone - autonomous QC pipeline

P0-1: Variable list sync from REDCap metadata
P0-2: QC rule configuration with JSON Logic + AI suggestion
P0-3: Scheduled QC + report generation + eQuery closed loop
P0-4: Unified dashboard + AI stream timeline + critical events

Backend:
- Add IitEquery, IitCriticalEvent Prisma models + migration
- Add cronEnabled/cronExpression to IitProject
- Implement eQuery service/controller/routes (CRUD + respond/review/close)
- Implement DailyQcOrchestrator (report -> eQuery -> critical events -> notify)
- Add AI rule suggestion service
- Register daily QC cron worker and eQuery auto-review worker
- Extend QC cockpit with timeline, trend, critical events APIs
- Fix timeline issues field compat (object vs array format)

Frontend:
- Create IIT business module with 6 pages (Dashboard, AI Stream, eQuery,
  Reports, Variable List + project config pages)
- Migrate IIT config from admin panel to business module
- Implement health score, risk heatmap, trend chart, critical event alerts
- Register IIT module in App router and top navigation

Testing:
- Add E2E API test script covering 7 modules (46 assertions, all passing)

Tested: E2E API tests 46/46 passed, backend and frontend verified
Made-with: Cursor

frontend-v2/src/modules/iit/index.tsx

@@ -0,0 +1,35 @@
+import React from 'react';
+import { Routes, Route, Navigate } from 'react-router-dom';
+import IitLayout from './IitLayout';
+
+const DashboardPage = React.lazy(() => import('./pages/DashboardPage'));
+const AiStreamPage = React.lazy(() => import('./pages/AiStreamPage'));
+const EQueryPage = React.lazy(() => import('./pages/EQueryPage'));
+const ReportsPage = React.lazy(() => import('./pages/ReportsPage'));
+
+const VariableListPage = React.lazy(() => import('./pages/VariableListPage'));
+
+const ConfigProjectListPage = React.lazy(() => import('./config/ProjectListPage'));
+const ConfigProjectDetailPage = React.lazy(() => import('./config/ProjectDetailPage'));
+
+const IitModule: React.FC = () => {
+  return (
+    <Routes>
+      {/* CRA 质控平台主界面 */}
+      <Route element={<IitLayout />}>
+        <Route index element={<Navigate to="dashboard" replace />} />
+        <Route path="dashboard" element={<DashboardPage />} />
+        <Route path="stream" element={<AiStreamPage />} />
+        <Route path="equery" element={<EQueryPage />} />
+        <Route path="reports" element={<ReportsPage />} />
+        <Route path="variables" element={<VariableListPage />} />
+      </Route>
+
+      {/* 项目配置界面（独立布局，不使用 CRA 质控平台导航） */}
+      <Route path="config" element={<ConfigProjectListPage />} />
+      <Route path="config/:id" element={<ConfigProjectDetailPage />} />
+    </Routes>
+  );
+};
+
+export default IitModule;