leaderboard: add legend for aesthetics

leaderboard_data.py

@@ -41,6 +41,9 @@ def make_pretty(df: pd.DataFrame) -> pd.DataFrame:
     for k in df.columns:
         if k in description_map:
             description += f"* {description_map[k]}\n"
+    if any("aesthetics_" in k for k in df.columns):
+        description += "* Enjoyment / Usefulness / Complexity / Quality are Aesthetics metrics, measured with [audiobox-aesthetics](https://github.com/facebookresearch/audiobox-aesthetics).\n"
+    
     # Only rename columns that exist in the dataframe
     existing_columns = {k: v for k, v in rename_map.items() if k in df.columns}
     df = df.rename(columns=existing_columns)