Fix: 添加详细调试日志诊断拓扑连线问题

- 在拓扑构建时输出每个设备的邻居详情
- 显示邻居的RemoteIP、RemoteDevice、接口信息
- 从数据库加载设备后重建拓扑确保连线正确
- 帮助诊断为什么邻居无法自动连线

cmd/main.go

@@ -265,6 +265,13 @@ func (app *App) handleGetDevices(w http.ResponseWriter, r *http.Request) {
 			log.Printf("Error: failed to get devices from database: %v", err)
 			// 降级到 builder获取
 			devices = app.builder.GetDevices()
+		} else {
+			// 重新构建设备到builder中，确保拓扑正确
+			app.builder = topology.NewBuilder()
+			for _, dev := range devices {
+				app.builder.AddDevice(dev)
+			}
+			log.Printf("Rebuilt topology with %d devices from database", len(devices))
 		}
 		log.Printf("Returning %d devices from storage", len(devices))
 	} else {