See #170 (closed):

• Broadcast delete (channel /track / album)
• Handle audio activities from Funkwhale servers
• Ensure funkwhale->funkwhale follows work properly
• Create channel from actor if relevant metadata is present
• Redirect to channel when fetching actor channel in the UI
• Ensure channel audio includes all necessary stuff: License, copyright, bitrate, position, duration, disc, album, etc.
• If album artist belongs to a channel, then assign the album to the channel artist