memra-kv 0.82.1

KV-cache format policy (q8_0/q5_1/q4_0/fp8 block layouts) for the memra inference engine
Documentation

memra-kv — the dual KV/recurrent cache, extracted (Phase D, ARCHITECTURE-H100.md §5).

Moved VERBATIM from memra-engine/src/cache.rs behind the KvDev seam: the cache only ever needed 7 device ops (alloc/copy/set), so the trait is that surface and nothing more. The append/dequant KERNELS stay in the engine fatbins — this crate owns the structure, sizing math, and the KV format policy (env-selected, shared by the engine's fatbin router and every cache consumer). memra-engine re-exports this as cache so call sites are unchanged.