feat: 完善堡垒机与 Agent 智能运维能力

- 支持 Windows Agent 构建、安装脚本和统一上报协议

- 增强 RDP 剪贴板、虚拟盘和文件传输能力

- 新增 AIOps 上下文工具、告警 RCA trace 落库和回放接口

- 重构 docs 模块文档并补充终端、堡垒机、监控、AI Agent 设计

agent/collector/mem_windows.go

@@ -0,0 +1,56 @@
+//go:build windows
+
+// Package collector 提供 Windows 内存指标采集能力。 // Logan.Li
+package collector
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+
+	"ezops/agent/model"
+)
+
+type memoryStatusEx struct {
+	Length               uint32
+	MemoryLoad           uint32
+	TotalPhys            uint64
+	AvailPhys            uint64
+	TotalPageFile        uint64
+	AvailPageFile        uint64
+	TotalVirtual         uint64
+	AvailVirtual         uint64
+	AvailExtendedVirtual uint64
+}
+
+type MemCollector struct{}
+
+func NewMemCollector() *MemCollector {
+	return &MemCollector{}
+}
+
+func (m *MemCollector) Collect() (model.MemoryStat, error) {
+	var ms memoryStatusEx
+	ms.Length = uint32(unsafe.Sizeof(ms))
+	ret, _, err := syscall.NewLazyDLL("kernel32.dll").NewProc("GlobalMemoryStatusEx").Call(uintptr(unsafe.Pointer(&ms)))
+	if ret == 0 {
+		return model.MemoryStat{}, fmt.Errorf("GlobalMemoryStatusEx 失败: %w", err)
+	}
+	total := ms.TotalPhys
+	avail := ms.AvailPhys
+	used := total - avail
+	swapTotal := ms.TotalPageFile
+	swapAvail := ms.AvailPageFile
+	swapUsed := uint64(0)
+	if swapTotal > swapAvail {
+		swapUsed = swapTotal - swapAvail
+	}
+	stat := model.MemoryStat{
+		TotalGB:      bytesToGB(total),
+		UsedGB:       bytesToGB(used),
+		AvailableGB:  bytesToGB(avail),
+		SwapUsedGB:   bytesToGB(swapUsed),
+		UsagePercent: float64(ms.MemoryLoad),
+	}
+	return stat, nil
+}