refactor schema retrieval in database setup to use collect_schema method

main.py

@@ -200,7 +200,7 @@ def setup_database():
         logger.info(f"Row count of new model data: {model_row_count}")
 
         if model_collection.count() < model_row_count:
-            schema = model_lazy_df.schema
+            schema = model_lazy_df.collect_schema()
             select_columns = [
                 "modelId",
                 "summary",