lingo: check num queries on transaction list page (#38115)

tests/test_lingo_manager.py

@@ -3,6 +3,8 @@
 import datetime
 
 from django.contrib.auth.models import User
+from django.db import connection
+from django.test.utils import CaptureQueriesContext
 from django.utils.timezone import now
 
 import mock
@@ -211,8 +213,10 @@ def test_transactions_search(app, admin_user):
                 amount=1+i).save()
 
     app = login(app)
-    resp = app.get('/manage/lingo/', status=200)
+    with CaptureQueriesContext(connection) as ctx:
+        resp = app.get('/manage/lingo/', status=200)
     assert resp.text.count('<tr') == 11
+    assert len(ctx.captured_queries) == 74
 
     resp.form['q'] = 'order id 16'
     resp = resp.form.submit()