There currently isn’t a use-case for handling notes and playlists in
schedule conflicts and the dashboard doesn’t implement it either.

The update of the created_by and updated_by model fields in many
serializers can be simplified by extracting the logic into a mixin.

We have introduced a system for custom field write permissions that
allows administrators to control which users can write specific fields
in steering.

This system is based on specific model permissions in the form of:
	{app_label}.edit__{model_name}__{field_name}

This mixin makes it easy to check said permissions simply by including
it as part of the serializer.