OnExchangeRateChange hook missing

[sander2]

This should have the poolmanager update hook - without it, stakes will not be correct. It is set in the testnet config but not on mainnet.

interbtc/parachain/runtime/kintsugi/src/lib.rs

Line 1080 in 04ba533

type OnExchangeRateChange = ();

Also for Interlay network. This should definitely be fixed before launching on mainnet. I want to look into moving more runtime setup code to the common crate to prevent cases like this (which is why I'm opening an issue rather than quickly fixing in a pr)