重构第一版：重新验证2.0推荐写法

debug/syntax_app/annotated_app.py

@@ -0,0 +1,7 @@
+from typing import Annotated
+
+
+def say_hello(name: Annotated[str, "this is just metadata"]) -> str:
+    return f"Hello {name}"
+
+print(say_hello('Annotated'))