Switches to \DocumentMetadata{tagging=on} for the reasons described in
the previous commit; the structure tree went from /Document plus eleven
/Link nodes to three headings, twenty paragraphs, a tagged list and the
abstract as a block quote.
Adds a worked example of the two things tagging cannot do for an
author. A data table carries \tagpdfsetup{table/header-rows={1}}, which
makes its first row TH rather than TD so a screen reader can announce
which column a value belongs to. A commented-out figure shows the alt=
argument to \includegraphics, which is what gets announced in place of
an image; it is left commented so the template does not have to ship a
binary, and mentions [artifact] for decorative images.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>