增加sys/debug 部署测试；agent dev/user/instance元信息提取优化；sys/tests 优化 (#26)

Reviewed-on: #26
Reviewed-by: xuxt <xuxt@zgclab.edu.cn>
Reviewed-by: huhy <husteryezi@163.com>
Reviewed-by: sundapeng <sundp@mail.zgclab.edu.cn>

src/sys/debug/scripts/09_down.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# shellcheck source=common.sh
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/common.sh"
+
+ensure_env_file
+require_docker
+
+log "Stopping debug stack (project $SYS_DEBUG_PROJECT_NAME)"
+compose down --remove-orphans >/dev/null 2>&1 || true
+
+log "Containers stopped. No host directories were removed."