ref(upstream): FULL TREE — Deep-Spark xllm (1470) + ds_vllm csrc/models (703)
Replaces cherry-picked upstream_ref with complete source trees.
xllm/ — Iluvatar official C++ inference engine (15MB, 1470 files)
Complete: kernels → layers → models → runtime → scheduler → api
Excluded: .git, binary images, third_party submodule checkouts
ds_vllm/ — Iluvatar official vllm fork (8MB, 703 files)
Included: csrc/ (ALL CUDA kernels), fused_moe/, qwen3_5 model, _custom_ops
Excluded: tests, benchmarks, docs, examples (not needed for reference)
Critical call chains now fully traceable:
MoE: moe_topk_softmax_kernels.cuh → ixformer.h → fused_moe.cpp → layer
GDN: qwen3_gated_delta_net_base.cpp → qwen3_5_gated_delta_net.cpp
Attention: ixformer.h → xllm_paged_attention → attention.cpp
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