700 is terrifying, if you only read what you find on the internet. After all, absent other factors, that number alone might look like end-state renal disease.
However, there are mitigating factors. 1) you have not presented with gradually elevating albumin over many years, which would be the failure mode for diabetic nephropathy. 2) you're quite young. 3) you (apparently) are not showing any other symptoms of genuine kidney failure.
I've never heard of lisinopril CAUSING albuminuria, but the high albumin when you have kept good BG control cries out for some investigation, for sure.
BTW, could you characterize more specifically what "proper glucose control" meant above? Here's the problem: If you're only testing with a glucometer occasionally, you could be getting deceptive data because the time you test happens to be a good time to get a low number.
Without a CGM you really need to test at least 7 times a day for a while (at least a week), and record all those numbers, to see what's really going on. Those 7 tests are: Before each meal, 2 hours after each meal, before bed.
If you only test in the morning when you get up, for example, you may see a good number every time because you've been fasting all night.