💥 feat(agent)!: 添加主机监控代理首版

* 实现周期采集、快照缓存、本地 HTTP API 和主动上报

* 补齐 Linux 和 Windows 主机、网络、资源、进程和 TCP 采集

* 添加服务生命周期管理、配置加载、构建脚本和测试覆盖

BREAKING CHANGE: network.ips 拆分为 network.ipv4s 和 network.ipv6s。

internal/service/service_other.go

@@ -0,0 +1,38 @@
+//go:build !linux && !windows
+
+package service
+
+import (
+	"fmt"
+	"runtime"
+
+	"mfd-monitor-agent/internal/config"
+)
+
+// unsupportedManager reports service lifecycle operations as unsupported on this platform.
+type unsupportedManager struct{}
+
+// newManager returns a manager that fails all service operations on unsupported platforms.
+func newManager() Manager {
+	return unsupportedManager{}
+}
+
+// Install reports that service installation is unsupported on this platform.
+func (unsupportedManager) Install(string, config.Config, InstallOptions) error {
+	return fmt.Errorf("service install is not implemented for %s", runtime.GOOS)
+}
+
+// Uninstall reports that service removal is unsupported on this platform.
+func (unsupportedManager) Uninstall(config.Config) error {
+	return fmt.Errorf("service uninstall is not implemented for %s", runtime.GOOS)
+}
+
+// Start reports that service start is unsupported on this platform.
+func (unsupportedManager) Start(config.Config) error {
+	return fmt.Errorf("service start is not implemented for %s", runtime.GOOS)
+}
+
+// Stop reports that service stop is unsupported on this platform.
+func (unsupportedManager) Stop(config.Config) error {
+	return fmt.Errorf("service stop is not implemented for %s", runtime.GOOS)
+}