[Misc] Add SPDX-FileCopyrightText (#19100)

Signed-off-by: simon-mo <simon.mo@hey.com>

vllm/distributed/device_communicators/all2all.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 import importlib.util
 from typing import TYPE_CHECKING
 

vllm/distributed/device_communicators/base_device_communicator.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 import threading
 from typing import Optional
 from weakref import WeakValueDictionary

vllm/distributed/device_communicators/cpu_communicator.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import os
 from typing import Optional

vllm/distributed/device_communicators/cuda_communicator.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from typing import Optional
 

vllm/distributed/device_communicators/cuda_wrapper.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """This file is a pure Python wrapper for the cudart library.
 It avoids the need to compile a separate shared library, and is
 convenient for use when we just need to call a few functions.

vllm/distributed/device_communicators/custom_all_reduce.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from contextlib import contextmanager
 from typing import Optional, Union

vllm/distributed/device_communicators/custom_all_reduce_utils.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import ctypes
 import json

vllm/distributed/device_communicators/hpu_communicator.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import torch
 import torch.distributed as dist

vllm/distributed/device_communicators/neuron_communicator.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 import torch
 
 from vllm.distributed.device_communicators.base_device_communicator import (

vllm/distributed/device_communicators/pynccl.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from typing import Optional, Union
 

vllm/distributed/device_communicators/pynccl_wrapper.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 # This file is a pure Python wrapper for the NCCL library.
 # The main purpose is to use NCCL combined with CUDA graph.

vllm/distributed/device_communicators/shm_broadcast.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import pickle
 import time

vllm/distributed/device_communicators/tpu_communicator.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import os
 from typing import Optional

vllm/distributed/device_communicators/xpu_communicator.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from typing import Optional
 

vllm/distributed/kv_events.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import queue
 import threading

vllm/distributed/kv_transfer/__init__.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from vllm.distributed.kv_transfer.kv_transfer_state import (
     KVConnectorBaseType, ensure_kv_transfer_initialized, get_kv_transfer_group,

vllm/distributed/kv_transfer/kv_connector/base.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """
 KVConnectorBase Class for Distributed KV Cache & Hidden State communication
 

vllm/distributed/kv_transfer/kv_connector/factory.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import importlib
 from typing import TYPE_CHECKING, Callable

vllm/distributed/kv_transfer/kv_connector/lmcache_connector.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """
 LMCache KV Cache Connector for Distributed Machine Learning Inference
 

vllm/distributed/kv_transfer/kv_connector/mooncake_store_connector.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """
 MooncakeStore Connector for Distributed Machine Learning Inference
 The MooncakeStoreConnector transfers KV caches between prefill vLLM workers