Better error reporting for data loading

data.py

@@ -4,6 +4,7 @@ from utils import logger
 import os
 from datetime import datetime
 import threading
+import traceback
 
 fs = HfFileSystem()
 
@@ -97,8 +98,14 @@ class CIResults:
             logger.info("Loading distant data...")
             new_df = get_distant_data()
         except Exception as e:
-            logger.error(f"Loading data failed: {e}")
-            logger.warning("Falling back on sample data.")
+            error_msg = [
+                "Loading data failed:",
+                "-" * 120,
+                traceback.format_exc(),
+                "-" * 120,
+                "Falling back on sample data."
+            ]
+            logger.error("\n".join(error_msg))
             new_df = get_sample_data()
         # Update attributes
         self.df = new_df