Add support for TurboQuant kv cache, with custom fused kernel for MLA#13
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Add support for TurboQuant kv cache, with custom fused kernel for MLA#13
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Cherry-pick from upstream PR sgl-project#21419. Implements Google TurboQuant algorithm for KV cache quantization via --kv-cache-dtype turboquant, achieving up to 4.92x compression with near-zero accuracy loss. Reference: Zandieh et al., TurboQuant: Online Vector Quantization with Near-optimal Distortion Rate (arXiv:2504.19874)
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Accuracy Tests
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