Build stable-diffusion.cpp Image

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• fix(stable-diffusion.cpp): 设 WORKDIR=/output，避免 capabilities 接口扫描 /pr…

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  Build stable-diffusion.cpp Image#2:Commit333c0e9pushedbyxukecheng
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• feat(stable-diffusion.cpp): 新增 sd-server CUDA 镜像，用于 Qwen-Image-2.1

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  Build stable-diffusion.cpp Image#1:Commit27addc8pushedbyxukecheng
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