baracuda-cuda-vocab

Owner source for the `cuda:` KISS §6.8 namespace vocabulary: the closed sm-token set (sm80/sm89/sm90/sm90a), their base|`a` classes, and the two admission relations (§cuda-3.1 `≤`, §cuda-3.2 `==`). The reference implementation the §6.8-0003 registry points at, and the source a generated §6.8-0008 machine annex + owner drift-gate build on. Driver-free: consumes `unpopped-vocab`'s `ArchSku` codec as the byte source of truth for token spellings, and owns the class + admission content the spec annex `spec/namespaces/cuda.md` states in prose.