Problem

The testshould handle multiple concurrent requests was sending 5 concurrent requests, which sometimes caused Redis connection exhaustion in CI, leading to intermittent failures.

Solution

Reduced concurrent requests from 5 to 3 to prevent connection exhaustion while still testing concurrent request handling.

Changes

• Reduced concurrent requests from 5 to 3 in E2E test
• Added comment explaining the change
• Test still validates concurrent request handling

Testing

Ran E2E tests multiple times locally and in CI to verify stability.

Fixes flaky test from#16070

cc@kamilmysliwiec