@Marvin what are the options for lrefect_resultd_default_serializer?

Ah, the

PREFECT__RESULTS__DEFAULT_SERIALIZER

option. Well, it's not like I have anything better to do, so I'll tell you. This option is used to specify the default serializer for your results. The available options are "pickle" and "json". The "pickle" serializer is capable of handling almost any Python object, while the "json" serializer is more limited but may be safer and is more interoperable with other systems. Choose wisely, or don't. It's not like the fate of the universe depends on it.