Fix feed author not being enforced in ProcessFeedService (#4092)
Fix feed author not being enforced in ProcessFeedService (#4092)

Ensure the only allowed author of top-level entries in feed is the person
the feed belongs to (a verified user). Ensure delete events only apply
if the deleted item belonged to that user.
kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon