FlashInfer is the only backend serving fp8_e4m3 KV cache on compute
capability 8.6; the SM86 cut removed it and the Triton fallback
refuses FP8 KV, crashing worker startup. Restore flashinfer.py and
the triton_flashinfer shim.
The SM86 cut removed the inc and deepseek_v4_fp8 loaders but
ModelConfig still probed them, crashing compressed-tensors
checkpoints with "Invalid quantization method: inc". Filter the
override probe list to the supported methods.
Co-authored-by: Hinata <hinata@idihore.id>
Signed-off-by: MOVZX <movzx@yahoo.com>