perf: cache TypeAdapters (#1243)

Author: stainless-bot

Diff for: src/openai/_models.py

@@ -534,12 +534,12 @@ class GenericModel(BaseGenericModel, BaseModel):
 
 
 if PYDANTIC_V2:
-
     if TYPE_CHECKING:
-      from pydantic import TypeAdapter
+        from pydantic import TypeAdapter
     else:
-      from pydantic import TypeAdapter as _TypeAdapter
-      TypeAdapter = lru_cache(_TypeAdapter)   
+        from pydantic import TypeAdapter as _TypeAdapter
+
+        TypeAdapter = lru_cache(_TypeAdapter)
 
     def _validate_non_model_type(*, type_: type[_T], value: object) -> _T:
         return TypeAdapter(type_).validate_python(value)