Scheduler timeout:  TypeError: can't compare offset-naive and offset-aware datetimes

pydal 20241204.1
Get following error when using scheduler: 

```
File "/home/py4web/.venv/lib/python3.12/site-packages/pydal/tools/scheduler.py", line 210, in step
if run.timeout and run.started_on + delta(run.timeout) < now():
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: can't compare offset-naive and offset-aware datetimes
```

