The "Important Notice" I got says "This included information related to your account". Also I got an email earlier on April 1 about a breach that sounds very similar if it's not the same one.

Sorry to pester, that exact wording?

I see "We wanted to let you know that we detected activity suggesting that information related to your account may have been accessed in a way that did not align with our internal policies." in the email i got this morning

Yes. Seems the wording in your email is different from mine.

company speak for "we lost your shit bro"