ReasoningLogger contract

Solidity 0.8.20 contract, deployed and live on Base mainnet, that persists every agent decision as an on-chain event. The fund's ExecutionAgent calls logDecision() after each cycle, producing a public, immutable audit trail of every verdict and the rationale behind it. Includes a circuit-breaker (trip()) for emergency halts and per-agent counters. Trade execution itself runs separately on the SoDEX testnet orderbook (ValueChain).