refactor: update configuration handling and OpenAI client initialization

config/config.py

@@ -149,7 +149,14 @@ class Config:
             FileNotFoundError: Configuration file not found
         """
         if not os.path.exists(config_path):
-            raise FileNotFoundError(f"Configuration file not found: {config_path}")
+            # copy base config file to the given path
+            base = "config/base_config.yaml"
+            if not os.path.exists(base):
+                raise FileNotFoundError(f"Base configuration file not found: {base}")
+            with open(base, "r") as base_file:
+                base_config = base_file.read()
+            with open(config_path, "w") as config_file:
+                config_file.write(base_config)
         self._config = OmegaConf.load(config_path)
         self.config_path = config_path