feat(pdd): 拼多多订单支持 out_sku_sn 匹配与浏览器插件加密保活

- 拼多多进单 Cookie 失效即时拦截与告警修复（支持 43001 会话过期等错误识别）
- 拼多多订单映射优先使用 out_sku_sn（外部商家编码）作为商品规格与工单匹配核心字段
- 新增 Chrome/Edge 浏览器扩展 (Manifest V3)，支持端到端 RSA-OAEP + AES-256-GCM 信封加密自动保活
- 后台店铺管理新增插件配对面板、专属密钥管理与一键导入配置 JSON

apps/backend/src/app.ts

@@ -10,6 +10,7 @@ import claimsRouter from './routes/claims.js'
 import kuaishouFeifeiRouter from './routes/kuaishou-feifei.js'
 import kuaishouIndustryRouter from './routes/kuaishou-industry.js'
 import open91Router from './routes/open-91.js'
+import pddExtensionRouter from './routes/pdd-extension.js'
 import shortLinksRouter from './routes/short-links.js'
 import workerRouter from './routes/worker.js'
 import { accessLogMiddleware } from './middleware/access-log.js'
@@ -105,6 +106,7 @@ export function createApp({ startupState, isShutdownStarted, config }: CreateApp
   app.use('/api/v1/open/kuaishou-feifei', kuaishouFeifeiRouter)
   app.use('/api/v1/claim', claimsRouter)
   app.use('/api/v1/collect', collectRouter)
+  app.use('/api/v1/pdd/extension', pddExtensionRouter)
   app.use('/api/v1/files', filesRouter)
   app.use('/api/v1/worker', workerRouter)
   app.use('/api/v1/admin', adminRouter)