What is the legal basis for the absence of fabricated (mawdu‘) hadiths in Sahih al-Bukhari, especially given the existence of a hadith that refers to Caliph Umar drinking wine at the end of his life?

Sahih Al-Bukhari is the most authentic book after the Holy Qur'an. The evidence for this is: Firstly, the consensus of the Ummah on its acceptance, and this consensus is infallible. Secondly, Al-Bukhari's statement: "I have only included in the Jami' book what is authentic," and the reality of the book confirms this. As for what is mentioned about Umar drinking alcohol at the end of his life, it is a great slander and falsehood against him, and it is not found in Sahih Al-Bukhari. Rather, Umar was one of the staunchest prohibitors of it.