nx_zimage_gguf_arch.nx

nx_zimage_gguf_arch.nx -- extract the REAL Z-Image text-encoder architecture from its GGUF, sovereignly. sd-server -> Nishi migration: the real-scale assembly needs the REAL dims to scale our f32 organs to. This reads the actual `Z-Image_Qwen_3_4b-Q6_K.gguf` and pulls token_embd.weight's dims (hidden, vocab) + ggml quant type + tensor_count from the parsed header (metadata at the front -> bounded prefix read, no multi-GB tensor materialization), and writes them to /tmp/zimg_arch.txt for inspection. Composes the proven sovereign GGUF reader. Gate: opens, GGUF v3, token_embd found, hidden>0. license_tier: ORIGINAL