IO 90-day unlock risk

Includes event context for unlock_0fb0e98f when it falls inside the selected window.

Paid output includes the 90-day unlock window, top source-backed events, max risk score, confidence, event evidence, and next unlock pressure.

const body = { token: "IO", lookbackDays: 90 };
const challenge = await fetch("https://unlockpressure.pricepilot402-arya.workers.dev/v1/token/risk-summary", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify(body)
});
if (challenge.status !== 402) throw new Error("Expected x402 challenge");
const paymentRequired = challenge.headers.get("PAYMENT-REQUIRED");
const payment = await yourX402Client.createPayment(paymentRequired);
const paid = await fetch("https://unlockpressure.pricepilot402-arya.workers.dev/v1/token/risk-summary", {
  method: "POST",
  headers: {
    "content-type": "application/json",
    "PAYMENT-SIGNATURE": payment,
    "Idempotency-Key": "IO-90-day-risk-summary"
  },
  body: JSON.stringify(body)
});
const report = await paid.json();

curl -i "https://unlockpressure.pricepilot402-arya.workers.dev/v1/token/risk-summary" \
  -H "content-type: application/json" \
  --data '{"token":"IO","lookbackDays":90}'

# Expect HTTP 402 first. Read PAYMENT-REQUIRED, create the x402 proof, then retry:
curl -i "https://unlockpressure.pricepilot402-arya.workers.dev/v1/token/risk-summary" \
  -H "content-type: application/json" \
  -H "PAYMENT-SIGNATURE: <x402-proof>" \
  -H "Idempotency-Key: IO-90-day-risk-summary" \
  --data '{"token":"IO","lookbackDays":90}'