chore: sync local updates

mengyamonitor-backend-client/build_linux.sh

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+#!/usr/bin/env bash
+# 一键交叉编译 Linux 采集端（amd64 + arm64），输出与 dist/install_mengyamonitor.sh 发布路径一致。
+#
+# 用法（在 mengyamonitor-backend-client 目录下）:
+#   chmod +x build_linux.sh && ./build_linux.sh
+#
+# Windows: Git Bash 同上；或在项目目录执行:  powershell -ExecutionPolicy Bypass -File .\build_linux.ps1
+#
+# 可选环境变量:
+#   BINARY_NAME   默认 mengyamonitor-agent
+#   OUT_DIR       默认 dist（相对本脚本所在目录）
+
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$ROOT"
+
+NAME="${BINARY_NAME:-mengyamonitor-agent}"
+OUT="${OUT_DIR:-dist}"
+
+mkdir -p "$OUT/linux_amd64" "$OUT/linux_arm64"
+
+export CGO_ENABLED=0
+
+echo "==> linux/amd64 -> $OUT/linux_amd64/$NAME"
+GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-s -w" -o "$OUT/linux_amd64/$NAME" .
+
+echo "==> linux/arm64 -> $OUT/linux_arm64/$NAME"
+GOOS=linux GOARCH=arm64 go build -trimpath -ldflags="-s -w" -o "$OUT/linux_arm64/$NAME" .
+
+echo "完成。产物:"
+for arch in amd64 arm64; do
+	f="$OUT/linux_${arch}/$NAME"
+	if command -v ls >/dev/null 2>&1; then
+		ls -la "$f"
+	else
+		echo "  $f"
+	fi
+done