Support custom fields

[kookster]

Folks have wanted to add source tracking or other random attributes on episodes.

These would need to be organization specific

Also have the ability to map them to rss elements?

active_fields sees to do most things?
https://github.com/lassoid/active_fields?tab=readme-ov-file#multi-tenancy-scoping

[brandonhundt]

Will start think about this along with supporting Podcasting 2.0 tags like the person tag.