Define an upper sampling rate of harp messages to rp2040 devices

[bruno-f-cruz]

The milestone #181 already logs all the commands so worst case scenario we can identify if messages fail to be sent. Additionally, given our current needs even a sub-optimal solution will work since we don't have any output high-bandwidth devices for now.
Nevertheless, we will try to c a come up with a more permanent solution as part of Harp spec (tracking harp-tech/protocol#42).

[bruno-f-cruz]

I have put a temporary fix in place for now while we evaluate more long-term solutions.