v0.40.5-rc1: New model... (#19030)

发生了什么

ci: shorten Windows Vulkan build path Keep the nested shader-generator compiler probes below Windows path limits in checkouts with longer repository names. mlx: fix Nemotron bugs and support global scales Accept published Nemotron layer names while retaining legacy aliases, and fix layer-count inference and detached MTP quantization. Stabilize Mamba softplus, preserve FP32 vision normalization, and compile Mamba gat…

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