sqlExport: Use insert_many() to bulk insert transactions

memberPlumbing/sqlExport.py

@@ -72,8 +72,12 @@ def do_import(config):
         ]
     )
 
-    for transaction in transactions:
+    Transaction.insert_many(
-        Transaction.from_csv_dict(transaction).insert_instance().execute()
+        [
+            Transaction.from_csv_dict(transaction).__data__
+            for transaction in transactions
+        ]
+    ).execute()
 
     # TODO: folders, levels, addons