jgrusewski 0914ad0315 feat(ensemble): GPU-native ensemble reduce kernel, remove CPU fallbacks ...

- New ensemble_reduce_kernel.cu: fused sigmoid→mean→weighted-sum in
  one kernel, single block, thread-per-model. Pure f32, no bf16.
- build.rs: nvcc compilation without --use_fast_math
- aggregate_logits_gpu: loads cubin, uploads raw f32 buffers, launches
  kernel, reads back single scalar. No GpuTensor/ActivationKernels.
- Removed aggregate_logits_cpu (dead code, GPU-only system)
- ml-explainability: removed unreachable dead code after stub return,
  prefixed unused vars. Zero warnings.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-29 22:35:37 +02:00

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