fix(drivers-prompt-openai): convert to text rather than error when passing GenericArtifacts (#1830)

Author: collindutter

griptape/drivers/prompt/openai_chat_prompt_driver.py

@@ -352,7 +352,7 @@ def __to_openai_message_content(self, content: BaseMessageContent) -> str | dict
         elif isinstance(content, ActionResultMessageContent):
             return content.artifact.to_text()
         else:
-            raise ValueError(f"Unsupported content type: {type(content)}")
+            return {"type": "text", "text": content.artifact.to_text()}
 
     def __to_prompt_stack_message_content(self, response: ChatCompletionMessage) -> list[BaseMessageContent]:
         content = []

tests/unit/drivers/prompt/test_openai_chat_prompt_driver.py

@@ -7,6 +7,7 @@
 
 from griptape.artifacts import ActionArtifact, ImageArtifact, ListArtifact, TextArtifact
 from griptape.artifacts.audio_artifact import AudioArtifact
+from griptape.artifacts.generic_artifact import GenericArtifact
 from griptape.common import ActionCallDeltaMessageContent, PromptStack, TextDeltaMessageContent, ToolAction
 from griptape.common.prompt_stack.contents.audio_delta_message_content import AudioDeltaMessageContent
 from griptape.drivers.prompt.openai import OpenAiChatPromptDriver
@@ -366,6 +367,8 @@ def prompt_stack(self):
                 },
             ),
         )
+
+        prompt_stack.add_user_message(GenericArtifact(value="generic-value"))
         return prompt_stack
 
     @pytest.fixture()
@@ -402,6 +405,7 @@ def messages(self):
             },
             {"audio": {"id": "audio-id"}, "content": "", "role": "assistant"},
             {"content": [{"type": "text", "text": "assistant-audio-transcription"}], "role": "assistant"},
+            {"content": [{"type": "text", "text": "generic-value"}], "role": "user"},
         ]
 
     @pytest.fixture()