fix(dropship): generate pallet numbers atomically and extend full regressions

warehouse-overseas-service/AGENTS.md

@@ -15,7 +15,7 @@
 | 内部资源锁定、释放、报废 | `controller/InternalWarehouseResourceLockController.java` |
 | PDA 托盘状态流转与补偿 | `controller/InternalPdaPalletTransitionController.java`、`service/WarehousePalletTransitionService.java`、`mapper/WarehousePalletTransitionMapper.java`；内部前缀 `/internal/v1/pda-pallet-transitions` |
 | 托盘解析与业务绑定 | `controller/InternalWarehousePalletController.java`、`dto/WarehousePalletResolveResponse.java`、`entity/WarehousePalletBindingEntity.java` |
-| 柜级入库计划批量托盘 | `controller/InternalWarehousePalletBatchController.java`、`service/WarehousePalletBatchService.java`、`warehouse-pallet-batch-internal-v1.yaml`；先预留，Lastleg 本地成功后确认，失败时仅补偿未确认资源 |
+| 柜级入库计划批量托盘 | `controller/InternalWarehousePalletBatchController.java`、`service/WarehousePalletBatchService.java`、`warehouse-pallet-batch-internal-v1.yaml`；以稳定批次键幂等执行 `ensure-reserved → confirm`，只从可预留真实托盘/库位建立逐项资源锁；Lastleg 本地计划事务失败时仅补偿仍为 `RESERVED` 的未确认资源，已 `CONFIRMED` 批次不得回退，同柜重放不得产生第二批资源 |
 | 仓储资源服务 | `service/WarehouseResourceService.java`、`WarehouseResourceLockService.java` |
 | 内部服务令牌 | `security/InternalServiceTokenGuard.java` |
 | 数据库基线与中文注释契约 | `src/main/resources/db/warehouse.sql`、`src/test/java/com/baiyue/warehouse/schema/SchemaChineseCommentContractTest.java` |