[TESTS] Add global random seed for deterministic test #357
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Description
This PR sets a fixed global random seed after imports in the test file to ensure deterministic and reproducible test behavior.
Motivation
Some tests rely on randomness without a fixed seed, which can lead to flaky tests, inconsistent CI results, and difficulty reproducing failures.
Change
A global random seed is initialized to make random behavior consistent across test runs.
Benefits
The issue was identified during an ongoing research project.