There is zero "solid plan" you can produce that prevents a popular thing in a democratic country from happening. Like, sure, there are supposed to be some amount of base rules to prevent you from gulaging people as soon as you get a 51% vote share, but if you have enough popularity for long enough, as designed, you can change those rules and eventually do whatever you want.

You can bet the shit the Nazis did wasn't "allowed" by the Weimar Republic's constitution, but that didn't matter one bit as soon as the brownshirts murdered enough people. Hitler wasn't even that popular at any point. The holocaust didn't happen because Germany didn't have enough "don't do holocausts" rules, it happened because millions of Germans just let it, because they didn't want to die under a brownshirt's boot.

Meanwhile we've had tens of examples of full blown genocides that did not use any database at all. It has never seemed to actually stop a genocide.

The answer, as always, is that it takes hard work to defend your rights, and you can never ignore your government, and you should stop trying to ignore your government. You cannot "defang" a government. If enough people are working to build an authoritarian shithole state, they will get it, and no paper will stop them, because "having enough people who want something" is literally what a government is.

We have thousands and thousands of years of history showing that if you want rights you have to fight for them.

>If someone points out that the system you're building can be abused

Any system of authority can be abused. No paper can fix that. The only thing that can fix that is a popular, credible threat to the people trying to abuse it.