Fix nip 57 code in make_lnurl_payment.

[santyr]

Missed one crucial step. Function should include separate invoicing for zaps. Something like:

# construct zap request if needed
        if lnurl_data.get("allowsNostr") and lnurl_data.get("nostrPubkey"):
            event_details = {
                "kind": 9734,
                "content": description or "CyberHerd Treats",
                "tags": [
                    ["p", lnurl_data["nostrPubkey"]]
                ],
                "pubkey": "669ebbcccf409ee0467a33660ae88fd17e5379e646e41d7c236ff4963f3c36b6",
                "created_at": round(datetime.now().timestamp()),
            }
            signed_zap_event = await sign_event(event_details, nos_sec)
            zap_event_encoded = quote(json.dumps(signed_zap_event))
            zap_url = f"{lnurl_data['callback']}?amount={amount}&nostr={zap_event_encoded}"
            zap_response = await client.get(zap_url, headers=headers)
            zap_response.raise_for_status()

            invoice = zap_response.json().get('payment_request', None)
            
            if invoice:
                logger.info(f"Received invoice: {invoice}")
                return await pay_invoice(client, invoice)  # pay_invoice should handle the payment and return a structured response
            else:
                logger.error("No invoice received from zap request")
                return {"success": False, "message": "No invoice received from zap request"}