clean: add typing

src/openai_agent.py

@@ -78,7 +78,7 @@ class Agent:
             return file.read()
 
     def image_request(
-        self, image, query, max_tokens=300, force_json=False
+        self, image: str, query: str, max_tokens: int = 300, force_json: bool = False
     ) -> AgentResponse:
         try:
             response = self.client.chat.completions.create(