feat: 系统调优 Go 版后端完整源码

- 19 个接口全部实测验收通过 (2026-08-08)
- 结构: main.go + core/consts + gsysctl + gtuner + server
- 含 build_go.sh 官方部署结构构建脚本 (amd64/arm64 交叉编译)
- 数据无缝衔接 Python 版遗留 (快照/state/审计日志)
- 备份自 156:/root/goddhv (2026-08-09)

build_verify.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+export PATH=$PATH:/usr/local/go/bin
+export GOPROXY=https://goproxy.cn,direct
+cd /root/goddhv
+echo "=== go vet 全部包 ==="
+go vet ./... 2>&1 | tail -30
+echo "=== go build 全部 ==="
+go build ./... 2>&1 | tail -30
+echo "=== 完整构建二进制 ==="
+go build -o /tmp/goddhv_main . 2>&1 | tail -20
+ls -la /tmp/goddhv_main 2>/dev/null && echo "BUILD_MAIN_OK"