Add SPDX copyright header to extraction script

Author: Dan Gil

.github/workflows/extract_dependency_versions.py

@@ -1,4 +1,19 @@
 #!/usr/bin/env python3
+# SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+
 """
 Extract all dependency versions from Dockerfiles and requirements files.
 Generates a CSV file with all dependencies across trtllm, vllm, sglang, and operator components.