Removes all data-maidr-victory-* attributes from tagged elements inside
the container (across every panel svg). Must be called before re-tagging to
prevent stale attributes from accumulating across re-renders. Panel stamps
on the svg roots themselves are left intact — they are index-stable.
Removes all
data-maidr-victory-*attributes from tagged elements inside the container (across every panel svg). Must be called before re-tagging to prevent stale attributes from accumulating across re-renders. Panel stamps on the svg roots themselves are left intact — they are index-stable.