add: workers/ 进程插件目录 + demo 示例（external 模式经 Zenoh 注册路由）

workers/demo/router/hello.py

@@ -0,0 +1,25 @@
+"""问候端点 — 演示框架参数注入（worker_id）与插件私有配置读取"""
+import time
+
+from chongming_worker import rpc_method
+
+from .. import global_var as gv
+from ..models.pydantic import HelloGetRequest, HelloGetResponse
+
+
+@rpc_method(
+    subject="demo.hello",
+    method="GET",
+    summary="进程插件示例：问候",
+    response_model=HelloGetResponse,
+)
+async def hello(
+    hello_get_request: HelloGetRequest,
+    worker_id: str = "",
+) -> HelloGetResponse:
+    """返回问候语 + 处理请求的 worker 副本 ID（证明请求经独立进程处理）"""
+    return HelloGetResponse(
+        greeting=f"{gv.greeting_prefix}, {hello_get_request.name}!",
+        worker_id=worker_id,
+        timestamp=time.time(),
+    )