Fix a test that was failing because of

Rack::QueryParser::QueryLimitError: total number of query parameters (20001) exceeds limit (4096)

This was introduced in rack 3.1.14, see https://github.com/rack/rack/blob/main/CHANGELOG.md#3114---2025-05-06

Author: mayorova

test/integration/huge_payload_test.rb

@@ -23,7 +23,7 @@ def setup
   end
 
   def test_report_handles_huge_payloads
-    payload = generate_payload((ENV['HUGE_PAYLOAD_SIZE'] || 10000).to_i)
+    payload = generate_payload((ENV['HUGE_PAYLOAD_SIZE'] || 2000).to_i)
 
     post '/transactions.xml', {}, :input           => payload,
                                   'CONTENT_TYPE'   => 'application/x-www-form-urlencoded',