fix(update): confirm incompatible plugin shutdown before restart

Co-authored-by: Codex <noreply@openai.com>

.github/workflows/release.yml

@@ -177,6 +177,8 @@ jobs:
           host_path = "backend/crates/gateway-plugin/runtime/plugin-host-compatibility.json"
           host = JSON.parse(File.read(host_path))
           abort "Invalid plugin host compatibility declaration: #{host_path}" unless host["schema_version"] == 2
+          # 保留旧更新器可解析的传输格式，实际支持范围仍取自当前宿主合同。
+          host = host.merge("schema_version" => 1, "permissions" => [])
           # 清单只依赖版本与兼容声明，平台归档和镜像消费同一份封口结果。
           manifest = {
             "schema_version" => 1,