sync model validation with cli catalog

tradingagents/llm_clients/anthropic_client.py

@@ -14,6 +14,7 @@ class AnthropicClient(BaseLLMClient):
 
     def get_llm(self) -> Any:
         """Return configured ChatAnthropic instance."""
+        self.warn_if_unknown_model()
         llm_kwargs = {"model": self.model}
 
         for key in ("timeout", "max_retries", "api_key", "max_tokens", "callbacks", "http_client", "http_async_client"):