Retrieve agent configuration

curl --request GET \
  --url https://api.proficientai.com/agents/{agent_id}/config

{
  "object": "agent_config",
  "anthropic": {
    "temperature": 123,
    "top_k": 123,
    "top_p": 123
  },
  "agent_id": "<string>",
  "greeting_message": "<string>",
  "initial_turn": "user",
  "model": "anthropic.claude-v1",
  "openai": {
    "frequency_penalty": 123,
    "presence_penalty": 123,
    "temperature": 123,
    "top_p": 123
  },
  "system_message": "<string>"
}