[GIP-272] Final steps to sunset V3.0 markets on Ethereum

# Summary This proposal initiates the sunset of all Credit Accounts in v3.0 markets on Ethereum. The objective is to migrate all remaining activity to v3.1. Any Credit Account that does not migrate before the expiration date will be closed automatically. Liquidation premiums will be returned to users. LPs are unaffected and may withdraw liquidity at any time. # Motivation Continuing to support multiple protocol versions creates unnecessary operational overhead and limits the ability to focus...