[Misc] Add SPDX-License-Identifier headers to python source files (#12628)

- **Add SPDX license headers to python source files**
- **Check for SPDX headers using pre-commit**

commit 9d7ef44c3cfb72ca4c32e1c677d99259d10d4745
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:18:24 2025 -0500

    Add SPDX license headers to python source files
    
This commit adds SPDX license headers to python source files as
recommended to
the project by the Linux Foundation. These headers provide a concise way
that is
both human and machine readable for communicating license information
for each
source file. It helps avoid any ambiguity about the license of the code
and can
    also be easily used by tools to help manage license compliance.
    
The Linux Foundation runs license scans against the codebase to help
ensure
    we are in compliance with the licenses of the code we use, including
dependencies. Having these headers in place helps that tool do its job.
    
    More information can be found on the SPDX site:
    
    - https://spdx.dev/learn/handling-license-info/

Signed-off-by: Russell Bryant <rbryant@redhat.com>

commit 5a1cf1cb3b80759131c73f6a9dddebccac039dea
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:36:32 2025 -0500

    Check for SPDX headers using pre-commit
Signed-off-by: Russell Bryant <rbryant@redhat.com>

---------
Signed-off-by: Russell Bryant <rbryant@redhat.com>

vllm/multimodal/base.py

+# SPDX-License-Identifier: Apache-2.0
+
 from abc import ABC, abstractmethod
 from collections import defaultdict
 from pathlib import Path

vllm/multimodal/hasher.py

+# SPDX-License-Identifier: Apache-2.0
+
 import pickle
 from typing import TYPE_CHECKING, Iterable, Mapping, Optional
 

vllm/multimodal/image.py

+# SPDX-License-Identifier: Apache-2.0
+
 import base64
 from functools import lru_cache
 from io import BytesIO

vllm/multimodal/inputs.py

+# SPDX-License-Identifier: Apache-2.0
+
 from abc import ABC, abstractmethod
 from collections import UserDict, defaultdict
 from collections.abc import Mapping, Sequence

vllm/multimodal/parse.py

+# SPDX-License-Identifier: Apache-2.0
+
 from abc import ABC, abstractmethod
 from collections import UserDict
 from collections.abc import Callable, Iterator, Mapping, Sequence

vllm/multimodal/processing.py

+# SPDX-License-Identifier: Apache-2.0
+
 import re
 from abc import ABC, abstractmethod
 from collections import defaultdict

vllm/multimodal/profiling.py

+# SPDX-License-Identifier: Apache-2.0
+
 from abc import ABC, abstractmethod
 from collections.abc import Mapping
 from dataclasses import dataclass, field

vllm/multimodal/registry.py

+# SPDX-License-Identifier: Apache-2.0
+
 import functools
 from collections import UserDict
 from dataclasses import dataclass

vllm/multimodal/utils.py

+# SPDX-License-Identifier: Apache-2.0
+
 from functools import lru_cache
 from itertools import groupby
 from pathlib import Path

vllm/multimodal/video.py

+# SPDX-License-Identifier: Apache-2.0
+
 import base64
 from functools import lru_cache, partial
 from io import BytesIO

vllm/outputs.py

+# SPDX-License-Identifier: Apache-2.0
+
 import time
 from dataclasses import dataclass
 from typing import Dict, Generic, List, MutableSequence, Optional

vllm/platforms/__init__.py

+# SPDX-License-Identifier: Apache-2.0
+
 import logging
 import traceback
 from itertools import chain

vllm/platforms/cpu.py

+# SPDX-License-Identifier: Apache-2.0
+
 import os
 from typing import TYPE_CHECKING, Optional
 

vllm/platforms/cuda.py

+# SPDX-License-Identifier: Apache-2.0
 """Code inside this file can safely assume cuda platform, e.g. importing
 pynvml. However, it should not initialize cuda context.
 """

vllm/platforms/hpu.py

+# SPDX-License-Identifier: Apache-2.0
+
 import os
 from typing import TYPE_CHECKING, Optional
 

vllm/platforms/interface.py

+# SPDX-License-Identifier: Apache-2.0
+
 import enum
 import platform
 import random

vllm/platforms/neuron.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import TYPE_CHECKING, Optional
 
 from vllm.logger import init_logger

vllm/platforms/openvino.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import TYPE_CHECKING, Optional
 
 import torch

vllm/platforms/rocm.py

+# SPDX-License-Identifier: Apache-2.0
+
 import os
 from functools import lru_cache
 from typing import TYPE_CHECKING, Dict, List, Optional

vllm/platforms/tpu.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import TYPE_CHECKING, Optional
 
 import torch