Runtime Upgrades and Capacity Model

This is a combination of three runtime upgrades that have already been enacted on kintsugi:

• 1.21.10: capacity-based vault revenue distribution
• 1.22.0: Governance Improvements
• 1.23.1: Security updates

For more details, please see the linked referenda above, and:

https://github.com/interlay/interbtc/releases/tag/1.23.1
https://github.com/interlay/interbtc/compare/1.20.1...1.23.1

The latest compatible clients release for this version is v1.21.0:
https://github.com/interlay/interbtc-clients/releases/tag/1.21.0

As a vault operator and collator that is here from the start I strongly support the quick introduction of the capacity model on Interlay.
I am aware that it is lowering the APR for some and I am one of these in Interlay.
It makes vault operation fair for everyone and prevents some entities "gaming the system" by bridging through their nodes and redeeming through others.
On Kintsugi my vault was "emptied" so many times and I had less than 5% APR for half a year and would have been better off just staking the collateral.
I hope all my fellow operators share this vision and support the initiative.