fix: 调整 conns 添加 conn 的语句顺序，防止可能存在的程序卡死

service/onvif/connection.go

@@ -13,6 +13,7 @@ func NewConnection(xaddr string, username string, password string) (*Connection,
 		Xaddr:    xaddr,
 		Username: username,
 		Password: password,
+		AuthMode: onvif.DigestAuth,
 	})
 	if err != nil {
 		return nil, err