Fix data saving

backend/utils/utils.py

@@ -576,7 +576,7 @@ def _ensure_plot_saved(
     bins: int = 30,
 ) -> str:
     os.makedirs("/tmp", exist_ok=True)
-    path = os.path.join("data", f"{basename}.png")
+    path = os.path.join("/tmp", f"{basename}.png")
 
     plt.figure(figsize=(8, 5))
     data = df[score_col].dropna().values