“It was. The Ministry of Magic’s entire supply got broken in the battle.
(‘?’ ??? ?)”
Not relevant to anything taking place before then. And it was in ‘??? ?.
“and before that people were very wary of messing with time, due to various unforeseen circumstances (‘?’ ??? ?).”
It doesn’t make sense to be worried about unforeseen circumstances because any unforeseen circumstances would have happened already. Unless you say that something already happened but no one knew about it yet and it only happened because you will go back in time, in which case by not going back in time it will not have happened. But that just brings back my other question which I don’t think yekke2’s answer actually resolves.