cuModuleLoadData hangs on H100 CUDA 13 when called after CUDA graph
capture — the context state appears incompatible with module loading.
Pre-initialize the OnceLock during GpuReplayBuffer::new() when the
context is clean and no graphs have been captured.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>