Add settled_at to zaps, scope by settlement status

spec/requests/webhooks_spec.rb

@@ -167,10 +167,14 @@ RSpec.describe "Webhooks", type: :request do
         expect(response).to have_http_status(:ok)
       end
 
+      it "adds the settlement date/time to the zap record" do
+        post "/webhooks/lndhub", params: payload.to_json
+        expect(user.zaps.first.settled_at.to_i).to eq(1673428978)
+      end
+
       it "creates and adds a zap receipt to the zap record" do
         post "/webhooks/lndhub", params: payload.to_json
-        zap = user.zaps.first
-        expect(zap.receipt).not_to be_nil
+        expect(user.zaps.first.receipt).not_to be_nil
       end
 
       it "publishes the zap receipt" do