Fix fragile integration test with timeout

[R-Palazzo]

Environment Details

• SDGym version: v0.14.3

Error Description

This test sometimes fails on GitHub Actions:
https://github.com/sdv-dev/SDGym/actions/runs/26380094560/job/77647540439

The test runs a benchmark with timeout=1. In some environments, UniformSynthesizer does not finish within that time, so its score values are None. The test then crashes while computing the adjusted score columns from the UniformSynthesizer results.

TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

Expected behavior

The test should pass reliably.
Suggested fix: increase the timeout or update the test setup so UniformSynthesizer reliably completes and GaussianCopulaSynthesizer reliably times out.