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- sat.go: DetectGPUVendor lspci fallback now checks GPU device classes ([0300]/[0302]/[0380]) per line instead of scanning the whole output for vendor name; AMD EPYC servers have dozens of AMD-branded PCIe entries (Root Complex, IOMMU, Host Bridge) that were triggering the old check - blackbox.go: fix deadlock in finishCycle — it held w.mu while calling persistState(), which acquires rt.mu then re-acquires w.mu inside persistStateLocked(); now w.mu is released before persistState() - build.sh: remove NVIDIA-specific overlay files (bee-gpu-burn, bee-john-gpu-stress, bee-nccl-gpu-stress, bee-nvidia-recover, bee-dcgmproftester-staggered, bee-check-nvswitch, nvidia-fabricmanager.service.d/) for non-nvidia build variants - bee-selfheal: gate NVIDIA recovery on BEE_GPU_VENDOR=nvidia so the script does not attempt to restart bee-nvidia.service on NOGPU builds Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>