* Implement followed tags API
* Insert statuses with followed tags into home timelines
* Test following and unfollowing tags
* Correct Swagger path params
* Trim conversation caches
* Migration for followed_tags table
* Followed tag caches and DB implementation
* Lint and tests
* Add missing tag info endpoint, reorganize tag API
* Unwrap boosts when timelining based on tags
* Apply visibility filters to tag followers
* Address review comments