Note

Stabilizes thpool runtime-config test by asserting num_threads_alive >= after add, then waiting until it equals RUNTIME_CONFIG_N_THREADS.

• Tests:
  • tests/cpptests/test_cpp_thpool.cpp:
    • In TestAddThreadsToEmptyPool, relax thread count check to ASSERT_GE(stats.num_threads_alive, RUNTIME_CONFIG_N_THREADS) after adding threads.
    • Add wait loop until num_threads_alive drops to RUNTIME_CONFIG_N_THREADS, then assert equality.
    • Keeps pool initialized checks; ensures eventual consistency of thread removal.

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