v0.9.0-rc2

Improved

• Ephemeral event handling should be faster by not checking the database for user existence.
• Using the register command now sends a link to the Telegram terms of service.
• The bridge_connected metric is now only set for users who are logged in.

Fixed

• Fixed bug where syncing members sometimes kicked ghosts of users who were actually still in the chat.
• Fixed sending captions to Telegram with !tg caption (broken in rc1).
• Logging out will now delete private chat portals, instead of only kicking the user and leaving the portal in a broken state (#397).
• Unbridging direct chat portals is now possible (#495).