Update unexcepted exception handling to log full traceback

[tofu-rocketry]

agents.py does stuff like the below when it encounters an exception it can't handle. This should be changed to use logging.exception so that the full traceback is captured for posterity. Needs changing for receiver and sender methods.

      except Exception as e:
        log.error('Unexpected exception: %s', e)
        log.error('Exception type: %s', e.__class__)
        log.error('The SSM will exit.')