add auditing for qrpay gateway

app/models/payment_gateway_audit.rb

@@ -0,0 +1,24 @@
+class PaymentGatewayAudit < ApplicationRecord
+  def self.record(
+    receipt_no:,
+    gateway_name:,
+    request_method: nil,
+    endpoint_url:,
+    event_type:,
+    request_body: {},
+    response_body: {},
+    shop_code:
+  )
+    payment_gateway_audit = PaymentGatewayAudit.new
+    payment_gateway_audit.receipt_no = receipt_no
+    payment_gateway_audit.payment_gateway_name = gateway_name
+    payment_gateway_audit.event_type = event_type
+    payment_gateway_audit.request_method = request_method
+    payment_gateway_audit.endpoint_url = endpoint_url
+    payment_gateway_audit.request_body = request_body
+    payment_gateway_audit.response_body = response_body
+    payment_gateway_audit.shop_code = shop_code
+
+    payment_gateway_audit.save!
+  end
+end