drop any weird entities and allow activity
Fix for https://github.com/bookwyrm-social/bookwyrm/issues/1348
bookwyrm uses some weird entity types that error out the validator, as well as an unusual way of handling reply collections - this optimistically fetches a referenced reply collection if it can, and also maps the extra odd entity types. not like it does much with them, just sorta steals their names
weird entities are here -> https://github.com/bookwyrm-social/bookwyrm/tree/main/bookwyrm/activitypub
Edited by Sadposter