feat(iit): Implement real-time quality control system

Summary:

- Add 4 new database tables: iit_field_metadata, iit_qc_logs, iit_record_summary, iit_qc_project_stats

- Implement pg-boss debounce mechanism in WebhookController

- Refactor QC Worker for dual output: QC logs + record summary

- Enhance HardRuleEngine to support form-based rule filtering

- Create QcService for QC data queries

- Optimize ChatService with new intents: query_enrollment, query_qc_status

- Add admin batch operations: one-click full QC + one-click full summary

- Create IIT Admin management module: project config, QC rules, user mapping

Status: Code complete, pending end-to-end testing
Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/common/jobs/PgBossQueue.ts

@@ -147,19 +147,29 @@ export class PgBossQueue implements JobQueue {
       // 避免每次 push 都尝试 createQueue 导致重复定义
 
       // 发送任务到pg-boss
-      // ✅ 使用 singletonKey 防止同一任务被重复入队
-      const singletonKey = (data as any).taskId || jobId
+      // ✅ 支持自定义 singletonKey 和 options（通过 data 中的特殊字段）
+      // 特殊字段：__singletonKey, __singletonSeconds, __expireInSeconds
+      const dataObj = data as any
+      const singletonKey = dataObj.__singletonKey || dataObj.taskId || jobId
+      const singletonSeconds = dataObj.__singletonSeconds || 3600  // 默认 1 小时
+      const expireInSeconds = dataObj.__expireInSeconds || 6 * 60 * 60  // 默认 6 小时
+
+      // 移除特殊字段，不传入 pg-boss
+      const cleanData = { ...dataObj }
+      delete cleanData.__singletonKey
+      delete cleanData.__singletonSeconds
+      delete cleanData.__expireInSeconds
       
       const bossJobId = await this.boss.send(type, {
-        ...data,
+        ...cleanData,
         __jobId: jobId, // 嵌入我们的jobId
         __createdAt: now.toISOString()
       }, {
         retryLimit: 3,
         retryDelay: 60,
-        expireInSeconds: 6 * 60 * 60, // 6小时过期（更适合长批次任务）
+        expireInSeconds,
         singletonKey, // ✅ 防止同一任务重复入队
-        singletonSeconds: 3600, // 1小时内不允许重复
+        singletonSeconds,
       })
 
       console.log(`[PgBossQueue] Job pushed: ${jobId} -> pg-boss:${bossJobId} (type: ${type})`)