Overview:
Removed testnet runtimes and standalone node
Automated benchmarks and added new weights
BTC-Relay now requires coinbase proof to prevent SPV attack
Resolved kintsugi syncing issues on startup
Oracle failures are now handled separately (by currency)
Added a new RPC to fetch the total stakeable funds
Fixes a bug where Vaults could not withdraw all of their collateral
Integrated the Frontier EVM and pallet-contracts (disabled for now)

For more details, please see the following:
https://github.com/interlay/interbtc/releases/tag/1.25.1

The latest compatible clients release for this version is v1.23.0:
https://github.com/interlay/interbtc-clients/releases/tag/1.23.0

This includes a wallet migration, please check the release notes to verify your installation.