Add vLLM-Omni library info to Hugging Face Hub requests (#5381)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

vllm_omni/entrypoints/openai/api_server.py

@@ -201,9 +201,9 @@ def _load_model_chat_template_json(model: str) -> str | None:
 
     if template_path is None:
         try:
-            from huggingface_hub import hf_hub_download
+            from vllm_omni.transformers_utils.repo_utils import hf_api
 
-            template_path = hf_hub_download(
+            template_path = hf_api().hf_hub_download(
                 repo_id=model,
                 filename="chat_template.json",
                 local_files_only=True,