* Limit visibility of some traits and methods
* WIP: alternative way to handle non-local object parsing
* finish this
* cleanup
* Move check for locked post into Comment::from_apub()
* Mark user as updated after fetching
* Should set last_refreshed_at, not updated
* Add ApubObject trait in DB, with method read_from_apub_id()
* Create shared, generic implementation for `FromApub`, prefer local data
* Check for community ban when parsing post/comment (fixes#1287)
* Fix tests (changes in get_object_from_apub() prevented `Update` from working)
* Support parsing `like.object` either as URL or object
* Send out like.object as URL, instead of full object (fixes#1283)
* add todo
