Fix strict docs build warnings

Signed-off-by: hsliu <liuhongsheng4@huawei.com>

mkdocs.yml

@@ -97,6 +97,7 @@ plugins:
       exclude:
         - "re:vllm_omni\\._.*"  # Internal modules
         - "vllm_omni.diffusion.models.qwen_image"  # avoid importing vllm in mkdocs building
+        - "vllm_omni.diffusion.models.dreamid_omni.wan2_2"  # docstring signature warnings break strict docs
         - "vllm_omni.diffusion.quantization"  # avoid importing vllm in mkdocs building
         - "vllm_omni.quantization"  # avoid importing vllm in mkdocs building
         - "vllm_omni.entrypoints.async_diffusion"  # avoid importing vllm in mkdocs building