C内核流量计算方法优化，前端文件名称读取优化

bat/setup-native-linux.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# Build the pinned native dependency beside the Python virtual environment.
+set -euo pipefail
+REPO_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd -P)"
+NATIVE_ENV="${SYSTEM_SIMULATION_NATIVE_ENV:-$REPO_ROOT/.venv/native}"
+VERSION=7.4.0
+ARCHIVE_SHA256=679ddacdd77610110e613164e8297d6d0cd35bae8e9c3afc8e8ff6f99a1c2a7b
+SOURCE_ROOT="$NATIVE_ENV/build/sundials-$VERSION"
+PREFIX="$NATIVE_ENV/sundials-$VERSION"
+for tool in curl cmake gcc tar sha256sum; do
+  command -v "$tool" >/dev/null || { echo "Missing build tool: $tool" >&2; exit 1; }
+done
+mkdir -p "$SOURCE_ROOT"
+ARCHIVE="$SOURCE_ROOT/sundials-$VERSION.tar.gz"
+if [[ ! -f "$ARCHIVE" ]]; then
+  curl --fail --location "https://github.com/LLNL/sundials/releases/download/v$VERSION/sundials-$VERSION.tar.gz" --output "$ARCHIVE"
+fi
+printf '%s  %s\n' "$ARCHIVE_SHA256" "$ARCHIVE" | sha256sum --check -
+if [[ ! -d "$SOURCE_ROOT/sundials-$VERSION" ]]; then
+  tar -xzf "$ARCHIVE" -C "$SOURCE_ROOT"
+fi
+cmake -S "$SOURCE_ROOT/sundials-$VERSION" -B "$SOURCE_ROOT/build" \
+  -DCMAKE_INSTALL_PREFIX="$PREFIX" -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_STATIC_LIBS=ON -DBUILD_SHARED_LIBS=OFF \
+  -DBUILD_ARKODE=OFF -DBUILD_CVODES=OFF -DBUILD_IDA=OFF \
+  -DBUILD_IDAS=OFF -DBUILD_KINSOL=OFF \
+  -DEXAMPLES_ENABLE_C=OFF -DEXAMPLES_INSTALL=OFF
+cmake --build "$SOURCE_ROOT/build" --parallel "${CMAKE_BUILD_PARALLEL_LEVEL:-4}"
+cmake --install "$SOURCE_ROOT/build"
+echo "Native dependency installed in $PREFIX"
+echo "The repository .venv Python discovers this default location automatically."