Fix Harmony reasoning parser for and auto-separation for gpt-oss models (#9190)

Co-authored-by: Chang Su <chang.s.su@oracle.com>
Co-authored-by: Chayenne <zhaochen20@outlook.com>
Co-authored-by: zhaochenyang20 <zhaochenyang20@gmail.com>
Co-authored-by: minleminzui <2969413251@qq.com>
Co-authored-by: maocheng23 <maocheng@berkeley.edu>
Co-authored-by: Xinyuan Tong <xinyuantong.cs@gmail.com>

python/sglang/srt/server_args.py

@@ -2271,6 +2271,7 @@ class ServerArgs:
             if is_mxfp4_quant_format:
                 # use bf16 for mxfp4 triton kernels
                 self.dtype = "bfloat16"
+
         elif "Llama4" in model_arch:
             assert self.attention_backend in {
                 "fa3",