Fix circular dependency

Author: tconley1428

temporalio/contrib/openai_agents/_temporal_openai_agents.py

@@ -25,7 +25,6 @@
 import temporalio.client
 import temporalio.worker
 from temporalio.client import ClientConfig
-from temporalio.contrib.openai_agents import AgentsWorkflowError
 from temporalio.contrib.openai_agents._invoke_model_activity import ModelActivity
 from temporalio.contrib.openai_agents._model_parameters import ModelActivityParameters
 from temporalio.contrib.openai_agents._openai_runner import (
@@ -37,6 +36,7 @@
 from temporalio.contrib.openai_agents._trace_interceptor import (
     OpenAIAgentsTracingInterceptor,
 )
+from temporalio.contrib.openai_agents.workflow import AgentsWorkflowError
 from temporalio.contrib.pydantic import (
     PydanticPayloadConverter,
     ToJsonOptions,