Phase 1 foundation: kherud fork + repo scaffolding #1

Job	Run time
Verify llama.cpp pin consistency	4s
Build Windows x86_64	1d 0h 0m 0s
Build Linux x86_64	3m 17s
Build Linux aarch64	3m 29s
Smoke test (UBI8 + Qwen 0.5B)	-1s
Package + (maybe) publish	0s
	1d 0h 6m 49s

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