Stabilize submitMoreProblemsThanCpus_allGetSolved by removing host-CPU dependence

[Copilot]

SolverManagerTest.submitMoreProblemsThanCpus_allGetSolved() was flaky because its load was derived from Runtime.availableProcessors(), making timing and scheduling behavior host-dependent. This could intermittently stall on job.getFinalBestSolution() under high iteration counts.

• Deterministic oversubscription setup

  • Set a fixed parallelSolverCount (2) for this test path.
  • Compute problemCount from that value (parallelSolverCount * 2) so the test still guarantees “more jobs than solver threads”.

• Targeted helper update

  • Changed createSolverManagerTestableByDifferentConsumers() to accept parallelSolverCount.
  • Constructed SolverManager with SolverManagerConfig.withParallelSolverCount(...) for this test scenario.

var parallelSolverCount = 2;
var problemCount = parallelSolverCount * 2;
try (var solverManager = createSolverManagerTestableByDifferentConsumers(parallelSolverCount)) {
    assertSolveWithoutConsumer(problemCount, solverManager);
    assertSolveWithConsumer(problemCount, solverManager, true);
    assertSolveWithConsumer(problemCount, solverManager, false);
}