chore: apply pep8-naming rules for naming convention (#8261)

api/core/ops/entities/config_entity.py

@@ -26,6 +26,7 @@ class LangfuseConfig(BaseTracingConfig):
     host: str = "https://api.langfuse.com"
 
     @field_validator("host")
+    @classmethod
     def set_value(cls, v, info: ValidationInfo):
         if v is None or v == "":
             v = "https://api.langfuse.com"
@@ -45,6 +46,7 @@ class LangSmithConfig(BaseTracingConfig):
     endpoint: str = "https://api.smith.langchain.com"
 
     @field_validator("endpoint")
+    @classmethod
     def set_value(cls, v, info: ValidationInfo):
         if v is None or v == "":
             v = "https://api.smith.langchain.com"

api/core/ops/entities/trace_entity.py

@@ -15,6 +15,7 @@ class BaseTraceInfo(BaseModel):
     metadata: dict[str, Any]
 
     @field_validator("inputs", "outputs")
+    @classmethod
     def ensure_type(cls, v):
         if v is None:
             return None

api/core/ops/langfuse_trace/entities/langfuse_trace_entity.py

@@ -101,6 +101,7 @@ class LangfuseTrace(BaseModel):
     )
 
     @field_validator("input", "output")
+    @classmethod
     def ensure_dict(cls, v, info: ValidationInfo):
         field_name = info.field_name
         return validate_input_output(v, field_name)
@@ -171,6 +172,7 @@ class LangfuseSpan(BaseModel):
     )
 
     @field_validator("input", "output")
+    @classmethod
     def ensure_dict(cls, v, info: ValidationInfo):
         field_name = info.field_name
         return validate_input_output(v, field_name)
@@ -196,6 +198,7 @@ class GenerationUsage(BaseModel):
     totalCost: Optional[float] = None
 
     @field_validator("input", "output")
+    @classmethod
     def ensure_dict(cls, v, info: ValidationInfo):
         field_name = info.field_name
         return validate_input_output(v, field_name)
@@ -273,6 +276,7 @@ class LangfuseGeneration(BaseModel):
     model_config = ConfigDict(protected_namespaces=())
 
     @field_validator("input", "output")
+    @classmethod
     def ensure_dict(cls, v, info: ValidationInfo):
         field_name = info.field_name
         return validate_input_output(v, field_name)

api/core/ops/langsmith_trace/entities/langsmith_trace_entity.py

@@ -51,6 +51,7 @@ class LangSmithRunModel(LangSmithTokenUsage, LangSmithMultiModel):
     output_attachments: Optional[dict[str, Any]] = Field(None, description="Output attachments of the run")
 
     @field_validator("inputs", "outputs")
+    @classmethod
     def ensure_dict(cls, v, info: ValidationInfo):
         field_name = info.field_name
         values = info.data
@@ -115,6 +116,7 @@ class LangSmithRunModel(LangSmithTokenUsage, LangSmithMultiModel):
             return v
         return v
 
+    @classmethod
     @field_validator("start_time", "end_time")
     def format_time(cls, v, info: ValidationInfo):
         if not isinstance(v, datetime):