The key wording is:
وَهُوَ سُنَّةٌ وَلَيْسَ بِوَاجِبٍ
Translation: It is Sunnah, not obligatory.
When asked about Tawaf al-Qudum, its classification here is Sunnah. The legal classification of the later Tawaf al-Ziyarah must not be transferred to this separate rite.