Token approval risk scan: lists active ERC20 allowances on a wallet's currently-held tokens and flags unlimited approvals (>= 2^255), especially to unverified spenders

Token approval risk scan: lists active ERC20 allowances on a wallet's currently-held tokens and flags unlimited approvals (>= 2^255), especially to unverified spenders. Returns verdict (clean/low_risk/review/high_risk), unlimited count, and per-approval token symbol, spender, spender_label, allowance, is_unlimited. For AI agent wallet security audits and pre-transaction risk checks.