revert union by name addition

app.py

@@ -47,11 +47,11 @@ def create_fresh_duckdb_with_views():
         # create views referencing remote parquet files
         local_con.execute(f"""
             CREATE OR REPLACE VIEW all_downloads AS
-            SELECT * FROM read_parquet('{hf_parquet_url_1}', union_by_name=true)
+            SELECT * FROM read_parquet('{hf_parquet_url_1}')
         """)
         local_con.execute(f"""
             CREATE OR REPLACE VIEW one_year_rolling AS
-            SELECT * FROM read_parquet('{hf_parquet_url_2}', union_by_name=true)
+            SELECT * FROM read_parquet('{hf_parquet_url_2}')
         """)
     except Exception:
         # If view creation fails, ensure connection is still returned for caller to handle/close