fix: vllm has no __version__ in editable install, use getattr + pipe to avoid docker parse error

docker/Dockerfile

@@ -306,7 +306,7 @@ RUN set -ex && \
 # 阶段 10：入口与最终验证
 # ===========================================================================
 RUN echo 'source /opt/mineru_venv/bin/activate' >> /etc/bash.bashrc && \
-    ${VENV}/bin/python -c "import torch, vllm, mineru; print('='*50); print('MinerU ROCm Docker Image Ready'); print(f'  PyTorch: {torch.__version__}'); print(f'  vllm:   {vllm.__version__}'); print(f'  MinerU:  {mineru.__version__}'); print('='*50)"
+    printf 'import torch, vllm, mineru\nprint("="*50)\nprint("MinerU ROCm Docker Image Ready")\nprint(f"  PyTorch: {torch.__version__}")\nv = getattr(vllm, "__version__", "editable")\nprint(f"  vllm:    {v}")\nprint(f"  MinerU:  {mineru.__version__}")\nprint("="*50)\n' | ${VENV}/bin/python
 
 ENTRYPOINT ["/bin/bash", "-c"]
 CMD ["bash"]