* [WIP] updated the output of VideoCollection to include playlists
* Updated source's name to collection_name; supported playlist ID/name fetching
* Hooked up collection_type to form; refactored enqueue_pending_media_downloads
* Added friendly_name to form
* Added media profile link to source view
* Updates comment
* Ensure channel detail lookup doesn't download the video - oops
* Ran the needful migrations for replacing channels with sources
* got media source test back working
* channel tasks test
* Media indexing worker test
* media tests
* Got all tests working except controller tests
* got all tests working
* Renamed Channel struct to Source
* renamed ChannelTasks
* More renaming; renamed channel details module
* Removed Channel yt-dlp module, instead throwing things in the VideoCollection module
* Renamed what looks like the last of the outstanding data
