* Add housekeeping function to delete old/expired EDUs
* Add migrations
* Evict EDUs from cache
* Fix queries
* Fix upgrade
* Use map[string]time.Duration to specify different expiry times
* Fix copy & paste mistake
* Set expires_at to tomorrow
* Don't allow NULL
* Add comment
* Add tests
* Use new testrig package
* Fix migrations
* Never expire m.direct_to_device
Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
Co-authored-by: kegsay <kegan@matrix.org>
