properly initialize seed for RandomEviction cache

[SirTyson]

Description

Fixes a bug where the RandomEvictionCache seed was not properly set.

Checklist

• Reviewed the contributing document
• Rebased on top of master (no merge commits)
• Ran clang-format v8.0.0 (via make format or the Visual Studio extension)
• Compiles
• Ran all tests
• If change impacts performance, include supporting evidence per the performance document

[Copilot]

Pull Request Overview

This PR fixes a bug in the RandomEvictionCache where the seed for random number generation was not properly initialized. The fix ensures thread-safe random number generation by providing each cache instance with its own seeded random number generator.

• Introduces a static global seed variable randomEvictionCacheSeed for thread-safe PRNG initialization
• Updates the cache constructor to initialize the random engine with the global seed
• Ensures the seed is properly reset in the global state reinitialization function

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/util/RandomEvictionCache.h	Adds static seed variable and updates constructor to initialize random engine with seed
src/util/Math.cpp	Updates global state reinitialization to properly set the RandomEvictionCache seed