scripts: consolidate Agent deployment and remove Probe packages

Use Agent for native, container, systemd and OpenWrt installations and signed updates. Remove retired Probe deployment templates and smoke scripts.

packaging/update/tests/feed-test.sh

@@ -108,7 +108,7 @@ resolve() { # 签名私钥 组件 镜像仓库
 }
 expect "first install: signed manifest pins the digest" "$REPO@$DIGEST" "$(resolve "$T/b.pem" agent "$REPO")"
 expect "first install: wrong signing key is refused" "REFUSED" "$(resolve "$T/c.pem" agent "$REPO")"
-expect "first install: manifest for another component is refused" "REFUSED" "$(resolve "$T/b.pem" probe "$REPO")"
+expect "first install: manifest for another component is refused" "REFUSED" "$(resolve "$T/b.pem" backend "$REPO")"
 expect "first install: manifest naming another repository is refused" "REFUSED" "$(resolve "$T/b.pem" agent "registry.evil/moshiro-dev/moshiro-agent")"
 
 # --- 第一次部署：正在跑的镜像就是清单里的这个 digest → 记成已安装（不当作有更新）