Fix/turbomind fp8 pre sm90 - #11
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* fix: harden serving request validation * fix: preserve anthropic parser decode options
* cover Qwen3.8 preserve_thinking support * remove 'reasoning' statement in user guide
…ltiple of uint (InternLM#4873) * allgather fallback * update comments * pad lm_head to uint4
Pre-SM90 FP8 weight-only path calls BlockscaleToGroupscale, whose kernel requires f32 input. Qwen3.5-FP8 checkpoints store block scales as bf16, so the TM_CHECK_EQ at cast.cu:248 aborted on load. Cast to f32 first, mirroring the native FP8 path at linear_weight.cc:164.
Drop the hard requirement that BlockscaleToGroupscale receive f32 scales. The kernel is templated on the source type, so dispatch over both src (half/bf16/f32) and dst (half/bf16) dtypes and let the elementwise cast happen in a single kernel launch. This removes the intermediate bf16->f32 buffer the caller previously needed.
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