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

upstream_ref/xllm/third_party/dependencies.sh

@@ -0,0 +1,131 @@
+#!/bin/bash
+
+# Color definitions
+GREEN="\033[0;32m"
+BLUE="\033[0;34m"
+YELLOW="\033[0;33m"
+RED="\033[0;31m"
+NC="\033[0m" # No Color
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+INSTALL_PREFIX="/usr/local/yalantinglibs"
+
+print_section() {
+    echo -e "\n${BLUE}=== $1 ===${NC}"
+}
+
+print_success() {
+    echo -e "${GREEN}✓ $1${NC}"
+}
+
+print_warning() {
+    echo -e "${YELLOW}$1${NC}"
+}
+
+print_error() {
+    echo -e "${RED}✗ ERROR: $1${NC}"
+    exit 1
+}
+
+run_or_die() {
+    local error_message="$1"
+    shift
+    "$@"
+    if [ $? -ne 0 ]; then
+        print_error "$error_message"
+    fi
+}
+
+ensure_dir() {
+    local dir_path="$1"
+    local error_message="$2"
+    if [ ! -d "${dir_path}" ]; then
+        run_or_die "${error_message}" mkdir -p "${dir_path}"
+    fi
+}
+
+remove_dir_if_exists() {
+    local dir_path="$1"
+    local dir_name="$2"
+    if [ -d "${dir_path}" ]; then
+        print_warning "${dir_name} directory already exists. Removing for fresh install..."
+        run_or_die "Failed to remove existing ${dir_name} directory" rm -rf "${dir_path}"
+    fi
+}
+
+patch_yalantinglibs_config() {
+    local config_file="$1"
+    if [ -f "${config_file}" ]; then
+        run_or_die \
+            "Failed to patch yalantinglibs config.cmake" \
+            sed -i \
+            '54s/target_link_libraries(${ylt_target_name} -libverbs)/target_link_libraries(${ylt_target_name} INTERFACE -libverbs)/' \
+            "${config_file}"
+    fi
+}
+
+patch_yalantinglibs_easylog() {
+    local easylog_header="$1"
+    if [ -f "${easylog_header}" ]; then
+        run_or_die \
+            "Failed to patch yalantinglibs easylog severity default" \
+            sed -i \
+            '/std::atomic<Severity> min_severity_ =/,/#endif/c\  std::atomic<Severity> min_severity_ = Severity::WARN;' \
+            "${easylog_header}"
+    fi
+}
+
+install_yalantinglibs() {
+    print_section "Installing yalantinglibs"
+
+    local thirdparties_dir="${REPO_ROOT}/third_party/Mooncake/thirdparties"
+    local yalanting_repo_url="https://gitcode.com/gh_mirrors/ya/yalantinglibs.git"
+    local yalanting_source_dir="${thirdparties_dir}/yalantinglibs"
+    local yalanting_build_dir="${yalanting_source_dir}/build"
+    local yalanting_config_file="${INSTALL_PREFIX}/lib/cmake/yalantinglibs/config.cmake"
+    local yalanting_easylog_header="${yalanting_source_dir}/include/ylt/easylog.hpp"
+
+    ensure_dir "${thirdparties_dir}" "Failed to create Mooncake/thirdparties directory"
+    remove_dir_if_exists "${yalanting_source_dir}" "yalantinglibs"
+
+    echo "Cloning yalantinglibs from ${yalanting_repo_url}"
+    run_or_die "Failed to clone yalantinglibs" git clone "${yalanting_repo_url}" "${yalanting_source_dir}"
+
+    echo "Checking out yalantinglibs version 0.5.5..."
+    run_or_die "Failed to checkout yalantinglibs version 0.5.5" git -C "${yalanting_source_dir}" checkout 0.5.5
+
+    patch_yalantinglibs_easylog "${yalanting_easylog_header}"
+
+    ensure_dir "${yalanting_build_dir}" "Failed to create build directory"
+
+    echo "Configuring yalantinglibs..."
+    run_or_die \
+        "Failed to configure yalantinglibs" \
+        cmake \
+        -S "${yalanting_source_dir}" \
+        -B "${yalanting_build_dir}" \
+        -DCMAKE_INSTALL_PREFIX="${INSTALL_PREFIX}" \
+        -DBUILD_EXAMPLES=OFF \
+        -DBUILD_BENCHMARK=OFF \
+        -DBUILD_UNIT_TESTS=OFF \
+        -DYLT_ENABLE_IBV=ON
+
+    echo "Building yalantinglibs (using $(nproc) cores)..."
+    run_or_die "Failed to build yalantinglibs" cmake --build "${yalanting_build_dir}" -j"$(nproc)"
+
+    echo "Installing yalantinglibs..."
+    run_or_die "Failed to install yalantinglibs" cmake --install "${yalanting_build_dir}"
+
+    patch_yalantinglibs_config "${yalanting_config_file}"
+    print_success "yalantinglibs installed successfully to ${INSTALL_PREFIX}"
+}
+
+main() {
+    ensure_dir "${INSTALL_PREFIX}" "Failed to create install directory: ${INSTALL_PREFIX}"
+    echo -e "${YELLOW}Installing to: ${INSTALL_PREFIX}${NC}"
+
+    install_yalantinglibs
+}
+
+main "$@"