fix: log account merge notifications

tests/test_account_linking_panel.py

@@ -269,6 +269,10 @@ class AccountLinkingPanelTests(unittest.IsolatedAsyncioTestCase):
             "last_name": "",
             "language_code": "ru",
         }
+        notification_service = SimpleNamespace(
+            notify_account_telegram_linked=AsyncMock(),
+            notify_account_merged=AsyncMock(),
+        )
 
         with (
             patch.object(account_routes, "_require_user_id", return_value=-100),
@@ -299,7 +303,7 @@ class AccountLinkingPanelTests(unittest.IsolatedAsyncioTestCase):
             ),
             patch(
                 "bot.services.notification_service.NotificationService",
-                return_value=SimpleNamespace(notify_account_telegram_linked=AsyncMock()),
+                return_value=notification_service,
             ),
         ):
             response = await account_routes.account_telegram_link_route(request)
@@ -325,4 +329,15 @@ class AccountLinkingPanelTests(unittest.IsolatedAsyncioTestCase):
         self.assertEqual(update_uuid, "panel-telegram")
         self.assertEqual(update_payload["email"], "linked@example.com")
         self.assertEqual(update_payload["telegramId"], 42)
+        notification_service.notify_account_merged.assert_awaited_once_with(
+            primary_user_id=42,
+            removed_user_id=-100,
+            email="linked@example.com",
+            telegram_id=42,
+            username="alice",
+            first_name="Alice",
+            final_end_date_text="",
+            primary_panel_user_uuid="panel-telegram",
+            removed_panel_user_uuid="panel-email",
+        )
         self.assertIn("rw_webapp_session", response.cookies)