fix: resolve CI lint and type errors

src/cli/cli.py

@@ -240,9 +240,9 @@ def _set_nested_attr(obj, attr_path: str, value: Any) -> None:
 
     final_attr = parts[-1]
     if hasattr(current, final_attr):
-        attr = getattr(type(current), final_attr)
-        if hasattr(attr, "annotation"):
-            type_hint = attr.annotation
+        attr = getattr(type(current), final_attr, None)
+        if attr is not None and hasattr(attr, "annotation"):
+            type_hint = attr.annotation  # type: ignore[attr-defined]
             if getattr(type_hint, "__origin__", None) is Union:
                 type_hint = type_hint.__args__[0]
             if hasattr(type_hint, "__name__"):