[BugFix] Fix scheduler problems in last PR. (#558)

This PR Fixes scheduler problems in last PR:
1. change position of DT test to validate it.
2. fix format of copyright.

Signed-off-by: whx-sjtu <2952154980@qq.com>

vllm_ascend/core/schedule_config.py

@@ -1,6 +1,5 @@
 #
 # Copyright (c) 2025 Huawei Technologies Co., Ltd. All Rights Reserved.
-# This file is a part of the vllm-ascend project.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,6 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+# This file is a part of the vllm-ascend project.
 #
 
 from dataclasses import dataclass, fields