ERC-8354 Enables Private ZK Verdicts for Autonomous Agents

ERC-8354 proposes pre-execution ZK allow/deny for autonomous agents, keeping policies undisclosed on-chain. Authors: Muhammad Zidan Fatonie, Faisal Firdani, Maulana Asykari Muhammad. Pull request #1919 open. Interface ID: 0x6c832e88. Uses EIP-712 signatures via SignatureChecker, enabling ERC-1271 accounts as executors. Reference implementation published under CC0-1.0.