Respect API limits

[draco2007]

Hello!

there is an API rate limit which makes it near impossible to send enough messages through the day. Mostly because the POST on the /api/user/memory can only be executes 240 times a day.

And this post is called for EVERY message which is send. So it is only possible to send 240 messages a day.

It would be ok if it clear all messages on one call, so you would be able to send messages every 6 minutes. For me this would be fine.