Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: samaloney

app/config.py

@@ -6,7 +6,7 @@
 
 class Settings(BaseSettings):
     data_path: Path = Path(os.getenv("DATAPATH", "/arccnet/data"))
-    models_path: Path = Path(os.getenv("MODESLPATH", "/arccnet/models"))
+    models_path: Path = Path(os.getenv("MODELSPATH", "/arccnet/models"))
 
 
 settings = Settings()

app/model_utils.py

@@ -17,8 +17,8 @@ def download_and_extract_model(
     model_url,
     model_name,
     *,
-    extracted_weights_filename="model-data/comet-torch-model.pth",
     model_data_path,
+    extracted_weights_filename="model-data/comet-torch-model.pth",
 ):
     """
     Downloads and extracts a model archive.
@@ -85,7 +85,7 @@ def download_and_extract_model(
             # If extracted file has different name, create expected path
             actual_extracted_path = model_cache_dir / target_file
             if actual_extracted_path != extracted_path:
-                actual_extracted_path.move(extracted_path)
+                actual_extracted_path.replace(extracted_path)
 
     if not extracted_path.exists():
         raise FileNotFoundError(f"Weights file not found at {extracted_path}")