fix issues

qwen3_6_scripts/protocol.py

@@ -99,11 +99,16 @@ class ModelList(OpenAIBaseModel):
     data: List[ModelCard] = Field(default_factory=list)
 
 
+class PromptTokensDetails(OpenAIBaseModel):
+    cached_tokens: int = 0
+
+
 class UsageInfo(OpenAIBaseModel):
     prompt_tokens: int = 0
     total_tokens: int = 0
     completion_tokens: Optional[int] = 0
     reasoning_tokens: Optional[int] = None
+    prompt_tokens_details: Optional[PromptTokensDetails] = None
 
 
 class RequestResponseMetadata(BaseModel):