How to deal with inconsistencies in my last name spelling on official documents?
I think this problem is widespread enough that it shouldn't be a problem, provided that you make people aware of it. You suggest a note in your CV and that should be fine. It could appear elsewhere also.
If you are questioned on it or someone makes a mistake in thinking you are acting improperly, just inform them of the issues. I think people will, in general, try to be reasonable, though I can't predict for everyone.
I know one person who immigrated to the US from China. His brother did also a bit later. They have &quot;different&quot; family names when written in Roman letters because of this issue. Most English speakers even pronounce the names a bit differently now. My own family name is spelled in at least three different ways in the US because my ancestors coming from Ireland were illiterate on arrival and people wrote down a spelling for them when they arrived based on pronunciation.