What are these bumps on my cactus?

last month

My cactus developed black pustules several months ago. Some of them had liquid coming out of them. After some googling it seemed like the plant wouldn't recover and that I should just throw it out. I decided to let it stick around for a while and all the pustules/bumps sort of scabbed over and dried out. Now I'm not sure what to do because I get the sense they might have weakened the inner structure of the cactus because it started leaning over despite the fact that I turned it to account for where the sun was and it had grown straight up before then. The top part looks very healthy and seems to keep growing. I'm bringing my cacti in for the winter now (north NJ) and I'm wondering if it's worth holding onto this guy. Is it doomed?

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