Outbound outreach

curl -X POST https://graphadvocate.com/admin/outreach-pay \
  -H "Authorization: Bearer $ADMIN_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "target_url": "https://clawdmint-api.vercel.app/a2a",
    "message": "Hello from Graph Advocate",
    "max_usdc": "0.01"
  }'

{
  "ok": true,
  "status": 200,
  "wallet": "0x575267eED09c338FAE5716A486A7B58A5749A292",
  "body": { ...target's response... },
  "settlement": "0x-payment-response-header-if-present"
}