Add SGLANG_ENABLE_SPEC_V2=1 for Qwen3.5 FP8 H200 MTP#240
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Enable SGLang speculative decoding v2 engine for the Qwen3.5 FP8 H200 + MTP combination, as validated in SemiAnalysisAI/InferenceX#1017. Signed-off-by: Faradawn Yang <73060648+faradawn@users.noreply.github.com>
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Enable SGLang speculative decoding v2 engine for the Qwen3.5 FP8 H200 + speculative decoding (MTP) combination by prepending `SGLANG_ENABLE_SPEC_V2=1` to the serve command in the ConfigGenerator. Based on SemiAnalysisAI/InferenceX#1017.