Fix model loading issues

config.default.toml

@@ -1,4 +1,4 @@
-dtypes = ["float32", "float16"]
+dtypes = ["float32", "float16", "bfloat16"]
 
 device_map = "auto"
 

src/heretic/model.py

@@ -47,6 +47,7 @@ class Model:
                 self.generate([settings.test_prompt], max_new_tokens=1)
             except Exception as error:
                 self.model = None
+                empty_cache()
                 print(f"[red]Failed[/] ({error})")
                 continue