Missing implementation: SetEventOnMultipleFenceCompletion on the D3D12 device

Missing implementation: SetEventOnMultipleFenceCompletion on the D3D12 device: a task in LegoFlow-SWE (Harbor dataset). The device method SetEventOnMultipleFenceCompletion is currently a stub that always returns E NOTIMPL , leaving callers unable to wait on multiple fences. Applications that rely…

The task

The device method `SetEventOnMultipleFenceCompletion` is currently a stub that always returns `E_NOTIMPL`, leaving callers unable to wait on multiple fences. Applications that rely on this API hang or malfunction because the event is never signaled.

Part of Lego-X/LegoFlow-SWE.