refactor(wms): 修改钢卷合卷功能返回结果卷

- 将IWmsMaterialCoilService.mergeCoils方法返回值从Boolean改为Long
- 更新WmsMaterialCoilController.mergeCoils方法以返回合卷后的新钢卷ID
- 修改WmsMaterialCoilServiceImpl.mergeCoils实现以返回合并后的钢卷ID
- 移除原有的布尔返回值，改为返回实际的业务数据ID
- 保持事务处理和业务逻辑完整性

klp-wms/src/main/java/com/klp/controller/WmsMaterialCoilController.java

@@ -256,8 +256,8 @@ public class WmsMaterialCoilController extends BaseController {
     @Log(title = "钢卷物料表-合卷", businessType = BusinessType.UPDATE)
     @RepeatSubmit()
     @PostMapping("/merge")
-    public R<Void> mergeCoils(@Validated(EditGroup.class) @RequestBody WmsMaterialCoilBo bo) {
-        return toAjax(iWmsMaterialCoilService.mergeCoils(bo));
+    public R<Long> mergeCoils(@Validated(EditGroup.class) @RequestBody WmsMaterialCoilBo bo) {
+        return R.ok(iWmsMaterialCoilService.mergeCoils(bo));
     }
 
     /**