fix(sync): resolve data dir from cwd, not __dirname

__dirname 走 dist 编译产物路径(dev: dist/modules/sync, prod 容器同),
向上 ../../../data 会越界到不存在的 dist/data。改用 cwd/data —
两态(dev/prod)cwd 都是 apps/pac-service 根,稳定指向源 data 目录。

apps/pac-service/src/modules/sync/sync.service.ts

@@ -160,12 +160,16 @@ export class SyncService {
 
   // ─── helpers ───
 
-  /// 数据目录:env PAC_INCREMENTAL_DATA_DIR 优先,否则默认 ../../data/<host>
+  /// 数据目录:env PAC_INCREMENTAL_DATA_DIR 优先,否则用 cwd/data
   /// (跟 SyncIncrementalSchedulerService 共用 env,运维只需配一处)
+  /// 用 cwd 而非 __dirname:
+  ///   - dev:  swc 编译到 dist,__dirname=dist/modules/sync → ../../../data 落到 dist/data(不存在)
+  ///   - prod: 容器 WORKDIR=/app/apps/pac-service,__dirname=dist/modules/sync 同样越界
+  ///   两边 cwd 都是 apps/pac-service 根,cwd/data 稳定指向源 data 目录
   private resolveDataDir(hostName: string): string {
     const base =
       process.env.PAC_INCREMENTAL_DATA_DIR ??
-      path.resolve(__dirname, '../../../data');
+      path.resolve(process.cwd(), 'data');
     return path.join(base, hostName);
   }