feat(attention): add decode-stage KV-cache CP replay - #260

feat(attention): add decode-stage KV-cache CP replay#260

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RL-Align:feat/ws2-attention-single-gpu-harness-pr2RL-Align/RL-Kernel:feat/ws2-attention-single-gpu-harness-pr2from

JLiu4Coding:codex/ws2-decode-kv-replayJLiu4Coding/RL-Kernel:codex/ws2-decode-kv-replayCopy head branch name to clipboard