Sui mainnet v1.72.2 release

[eug...@mystenlabs.com]

The next Sui v1.72.2 upgrade for mainnet is now available. This release includes protocol version 124, which will activate at the next epoch boundary once 83.4% of validators by stake have upgraded. Thank you!
🔔 Note: ⚠️ Please upgrade ASAP. This release introduces two major protocol enhancements: Address Balances and Gasless Stablecoin Transfers. Address Balances introduce a canonical per-address balance model for each token type alongside the existing Coin object model, simplifying transaction construction by removing the need for coin selection, splitting, and merging. Gasless Stablecoin Transfers enable supported stablecoins to be sent peer-to-peer — including batched PTBs — with no gas fees and no gas token required. Operator note: v1.72.2 performs an rpc-index database v4 migration on first startup; fullnodes with RPC indexing enabled will be unavailable for ~30 minutes per node while the index rebuilds — plan upgrades accordingly.

Branch: mainnet
Commit: 85b460a63fd76a15672bbe4820bde6db78a3cfb8
Tag: mainnet-v1.72.2
Release Notes: https://github.com/MystenLabs/sui/releases/tag/mainnet-v1.72.2