Add `payerNote` + `payerKey` to incoming payment event

[pm47]

Examples:

• incoming payment record

  $ ./phoenix-cli getincomingpayment --paymentHash 4c24b8f3edb59bebb7a8e7a2b3aa3edec0fff1e31486a9cb16757c7a48e3ade6
  {
  "paymentHash": "4c24b8f3edb59bebb7a8e7a2b3aa3edec0fff1e31486a9cb16757c7a48e3ade6",
  "preimage": "e314efba8185ff74174724ae7ab90a719b6f17e18f6d665b660d99147e9425c3",
  "isPaid": true,
  "receivedSat": 654,
  "fees": 0,
  "payerNote": "Hello there",
  "payerKey": "02a253612063909c59bfa766d3c459a3eb3ec50c51f938099397158200d025f213",
  "completedAt": 1723625140183,
  "createdAt": 1723625140180
  }

  • incoming payment event

    {
    "type": "payment_received",
    "timestamp": 1723625140215,
    "amountSat": 654,
    "paymentHash": "4c24b8f3edb59bebb7a8e7a2b3aa3edec0fff1e31486a9cb16757c7a48e3ade6",
    "payerNote": "Hello there",
    "payerKey": "02a253612063909c59bfa766d3c459a3eb3ec50c51f938099397158200d025f213"
    }

cc @remyers See #91.