Author linking fails between h-entry/u-author and external h-card/u-url

Hello,

Here is an example page: https://scripter.co/hugo-leaf-and-branch-bundles/

### Inside `h-entry`

```html
Kaushal Modi
```

### Inside `h-card`

```html

The author linking is working as per:

- https://xray.p3k.io/parse?pretty=true&url=https%3A%2F%2Fscripter.co%2Fhugo-leaf-and-branch-bundles%2F
- https://sturdy-backbone.glitch.me/test?url=https%3A%2F%2Fscripter.co%2Fhugo-leaf-and-branch-bundles%2F

But https://indiewebify.me/validate-h-entry/?url=https%3A%2F%2Fscripter.co%2Fhugo-leaf-and-branch-bundles%2F gives:

> You’re marking up your post’s author as a string — add h-card to make it a full h-card!


Can this please be fixed?

\cc @aaronpk

Reproduce the report using the linked page and compare indiewebify.me with the xRay and sturdy-backbone results, focusing on the h-entry u-author and external h-card/u-url markup. Trace the validator's author-linking behavior, then verify that a valid external h-card is accepted without the string warning.

Written by the indexing model from the issue text.