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fix(cuda.core): serialize pinned-memory kernel-access test on Windows

closes #3426 Add @thread_unsafe_on_windows to the pinned-memory kernel-access test. The test accesses host memory while parallel workers may execute GPU work; synchronizing its own stream does not coordinate those workers. This follows the guard used by similar tests on Windows and WSL. Windows CI is needed to confirm it resolves the reported crashes. The separate OOM failures remain under investigation. Validation: Ruff and git diff --check pass.

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cuda_core/tests
- test_memory.py

`‎cuda_core/tests/test_memory.py‎`

-Original file line number
+Diff line change
     buffer.close()
 +@thread_unsafe_on_windows
 @pytest.mark.human_reviewed
 @pytest.mark.parametrize("pool", ["current", "new", "new_numa"])
 def test_pinned_memory_resource_kernel_access(init_cuda, pool):

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