add get_info method to return model details for /models endpoint

app/models/llama_cpp_model.py

@@ -114,6 +114,18 @@ class LlamaCppModel(BaseLLM):
         
         return response_text
 
+    def get_info(self) -> Dict[str, Any]:
+        """Return model information for /models endpoint."""
+        return {
+            "name": self.name,
+            "model_id": self.model_id,
+            "type": "gguf",
+            "backend": "llama.cpp",
+            "context_length": self.n_ctx,
+            "loaded": self._initialized,
+            "model_path": self.model_path
+        }
+
     async def cleanup(self) -> None:
         """Free memory."""
         if self.llm: