Doc Strings Missing for 'extend' Fields in HTML Documentation

[MisterGC]

Fields defined with the extend keyword in a zserio schema are missing their doc strings in the generated HTML documentation.

Steps to Reproduce:

1. Create a zserio schema with extend fields, including doc strings.
2. Generate the HTML documentation.
3. Observe that the doc strings for extend fields are absent.

Example Schema:

struct SomeStruct
{
    /** Some data. */
    ExampleType exampleType;

    /** Some additional data.*/
    extend optional ExampleExtension exampleExtension;
}

Zserio Version: 2.15.0 Generated HTML: The doc string for exampleExtension is missing. Expected Behavior: Doc strings for extend fields should appear in the generated HTML documentation.

[mikir]

OK, thanks to point this out. I will put it to the current milestone.