Redis alternatives => Redis change license

[MaximeWewer]

Hi,

With Redis license change redis/redis#13157 it could be necessary to inspect impact of this change and bench alternatives. Ex: https://github.com/dragonflydb/dragonfly or https://github.com/Snapchat/KeyDB.

[zuiderkwast]

https://github.com/valkey-io/valkey

[jmaibaum]

https://codeberg.org/redict/redict

[dami-i]

https://valkey.io/

[BeryJu]

As we're not re-selling redis as a service, this license change does not affect us. Anything that is 100% redis compatible should work with authentik just fine, however we do officially only support Redis.