Sync code and test CI; rename some env vars (#11686)

python/sglang/srt/speculative/spec_info.py

@@ -1,5 +1,6 @@
 from abc import ABC, abstractmethod
 from enum import IntEnum, auto
+from functools import lru_cache
 from typing import List, Tuple
 
 from sglang.srt.managers.schedule_batch import ModelWorkerBatch
@@ -27,6 +28,7 @@ class SpeculativeAlgorithm(IntEnum):
     def is_ngram(self):
         return self == SpeculativeAlgorithm.NGRAM
 
+    @lru_cache(maxsize=None)
     @staticmethod
     def from_string(name: str):
         name_map = {