Date in summary table is missing (#10)

- Date in summary table is missing (45fc3a4337e324d17f54b9564db1dbc11951ff36)

simple_data_loader.py

@@ -162,7 +162,7 @@ class SimpleLeaderboardViewer:
                     'agent_version': metadata.get('agent_version', 'Unknown'),
                     'llm_base': metadata.get('model', 'unknown'),
                     'openness': metadata.get('openness', 'unknown'),
-                    'submission_time': metadata.get('submission_time', ''),
+                    'submission_time': score_entry.get('submission_time', metadata.get('submission_time', '')),
                     'release_date': metadata.get('release_date', ''),  # Model release date
                     'parameter_count_b': metadata.get('parameter_count_b'),  # Total params in billions
                     'active_parameter_count_b': metadata.get('active_parameter_count_b'),  # Active params for MoE