Update python sdk

sdk/turing/generated/model/traffic_rule_condition.py

@@ -115,7 +115,7 @@ def __init__(self, field_source, field, values, *args, **kwargs):  # noqa: E501
 
         Args:
             field_source (FieldSource):
-            field (str): If `field_source` is `header`, then `field` should contain the name of the request header, otherwise, if `field_source` is `payload`, then `field` should be a valid json path 
+            field (str): For HTTP_JSON protocol, the valid `field_source` are `header` and `payload`. Whereas, for UPIV1 protocol the valid `field_source` are `header` and `prediction_context` If `field_source` is `header`, then `field` should contain the name of the request header, otherwise, if `field_source` is `payload`, then `field` should be a valid json path. If `field_source` is `header`, then `field` should contain the name of the request header, otherwise, if `field_source` is `prediction_context`, then `field` should contains variable name. 
             values ([str]):
 
         Keyword Args:

sdk/turing/router/config/traffic_rule.py

@@ -13,6 +13,7 @@
 class FieldSource(Enum):
     HEADER = "header"
     PAYLOAD = "payload"
+    PREDICTION_CONTEXT = "prediction_context"
 
     def to_open_api(self) -> OpenApiModel:
         return turing.generated.models.FieldSource(self.value)