add: demo 进程插件配置（load_mode=external, workers.demo）

workers/demo/config.toml

@@ -0,0 +1,25 @@
+# ====== 插件注册信息（进程插件示例：独立进程运行） ======
+[workers]
+type = "demo"
+module = "workers.demo"
+factory = "create_workers"
+cleanup = "cleanup"
+count = 2
+# 进程插件：由 Docker/K8s 编排拉起独立进程（容器入口 uv run worker_serve --type demo），
+# 经 Zenoh 注册路由，网关动态挂载；与 src/plugins/ 下的 inline 插件可同时存在
+load_mode = "external"
+
+[worker]
+name = "demo"
+version = "0.1.0"
+description = "进程插件示例 — 独立进程运行，经 Zenoh 注册路由"
+config_version = "1.0"
+defaults = { method = "GET", timeout = 30.0, auth_required = false, cacheable = false, internal = false }
+
+[worker.registration]
+router_prefix = "/demo"
+tags = ["demo", "process-plugin"]
+
+# ====== Worker 运行时配置（由 worker_serve 传递给 create_workers） ======
+[workers.config]
+greeting_prefix = "Hello"     # 演示插件私有配置项

workers/demo/hello.toml

@@ -0,0 +1,9 @@
+[GET]
+summary = "进程插件示例：问候"
+params = ["name: str"]
+auth_required = false
+
+[GET.response_model]
+greeting = { type = "str", required = true }
+worker_id = { type = "str", required = false, default = "" }
+timestamp = { type = "float", required = true }