Interoperability beyond other Mobilizon instances (FEP-8a8e)
Currently Mobilizon is not working together with neither Gancio or WordPress.
Main reasons are:
1. Mobilizon does immediately reject/ignore an incoming `Event` if it does not understand expect a single property, e.g. an incoming attachment of type `Image` breaks federation. It should follow the principle "I read what I understand" and ignore the rest.
2. Mobilizon does handle visibility with by type of the actor who created it, and whether it has also been announced by the actor who created it.
In the long run it would be really helpful if Mobilizon implements [FEP-8a8e](https://codeberg.org/fediverse/fep/pulls/430).
--> https://codeberg.org/fediverse/fep/src/branch/main/fep/8a8e/fep-8a8e.md
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