Add vendor to buyer notification

packages/discovery-provider/ddl/functions/handle_usdc_purchase.sql

@@ -35,7 +35,8 @@ begin
                 'seller_user_id', new.seller_user_id,
                 'amount', new.amount,
                 'extra_amount', new.extra_amount,
-                'content_id', new.content_id
+                'content_id', new.content_id,
+                'vendor', new.vendor
             )
           )
         on conflict do nothing;

packages/discovery-provider/integration_tests/notifications/test_usdc_purchase.py

@@ -75,5 +75,6 @@ def test_usdc_purchase_notification(app):
             "amount": 1000,
             "extra_amount": 0,
             "content_id": 100,
+            "vendor": None,
         }
         assert buyer_notifications[0].slot == 4

packages/discovery-provider/integration_tests/queries/test_notifications/test_usdc_purchase_notification.py

@@ -83,6 +83,7 @@ def test_get_usdc_purchase_notifications(app):
                 "amount": 1000000,
                 "extra_amount": 0,
                 "content_id": 1,
+                "vendor": None,
             }