Route an Ontario task through free and paid eligibility gates

Return the matching free Ontario tool or a paid recommendation only after the caller declares completed free preflight, a wallet-enabled x402 client, Base network support, and an explicit USDC ceiling that covers the fixed price. Provider-side publication tasks can route to the 0.50 USDC x402 service-profile product after those gates. The router never calls a tool, signs a payload, increases a budget, or spends funds.