Fix auto_map: use root-level filename.ClassName format

config.json

@@ -21,7 +21,7 @@
   "transformers_version": "5.8.1",
   "vocab_size": 100277,
   "auto_map": {
-    "AutoConfig": "parchment.configuration_parchment.ParchmentConfig",
-    "AutoModelForCausalLM": "parchment.modeling_parchment.ParchmentForCausalLM"
+    "AutoConfig": "configuration_parchment.ParchmentConfig",
+    "AutoModelForCausalLM": "modeling_parchment.ParchmentForCausalLM"
   }
 }