Implement retry that automatically detect httpx and backoff (#119)

* server: implement retry that automatically detect httpx and backoff

Closes #118

* server: fix formatting

server/reflector/llm/llm_banana.py

@@ -20,6 +20,7 @@ class BananaLLM(LLM):
                 headers=self.headers,
                 json={"prompt": prompt},
                 timeout=self.timeout,
+                retry_timeout=300,  # as per their sdk
             )
             response.raise_for_status()
             text = response.json()["text"]

server/reflector/llm/llm_openai.py

@@ -21,7 +21,6 @@ class OpenAILLM(LLM):
             "Authorization": f"Bearer {self.openai_key}",
         }
 
-
         async with httpx.AsyncClient(timeout=self.timeout) as client:
             response = await client.post(
                 self.openai_url,