OP Update Proposal #3: Enable onchain treasury execution

Agora, the governance software company behind the Optimism token house governor frontend, proposes an upgrade that lets OP token treasury transfers execute onchain automatically, without manual execution by the Optimism Foundation. Non-treasury transfers, such as protocol and governance upgrades, would continue to be executed by the Foundation. The upgrade updates the governor contract and a voting module and proposal types configurator, and adds a newly deployed Timelock with a 3-day delay that controls treasury funds. The change is being audited by Trust Security, and Agora does not anticipate downtime, with proposal creation and voting unaffected.