fix import

Author: phact

impl/routes_v2/threads_v2.py

@@ -25,7 +25,7 @@
 from impl.services.inference_utils import get_chat_completion, get_async_chat_completion_response
 from impl.utils import map_model, store_object, read_object, read_objects, generate_id
 from impl.model_v2.create_thread_and_run_request import CreateThreadAndRunRequest
-from model_v2.create_message_request import CreateMessageRequest
+from impl.model_v2.create_message_request import CreateMessageRequest
 from openapi_server_v2.models.assistants_api_response_format_option import AssistantsApiResponseFormatOption
 from openapi_server_v2.models.assistants_api_tool_choice_option import AssistantsApiToolChoiceOption
 from openapi_server_v2.models.message_delta_object_delta_content_inner import MessageDeltaObjectDeltaContentInner