feat: completely overhaul the auth model

* Cookies are now encrypted JWTs (GHSA-wrqq-v7qw-r5w7)
* Authentication is stored in the SQLite database (auto-migrated)
* Session logic is much cleaner

app/routes/users/onboarding-skip.tsx

@@ -1,16 +1,23 @@
+import { eq } from 'drizzle-orm';
 import { LoaderFunctionArgs, redirect } from 'react-router';
 import { LoadContext } from '~/server';
+import { users } from '~/server/db/schema';
 
 export async function loader({
 	request,
 	context,
 }: LoaderFunctionArgs<LoadContext>) {
-	const session = await context.sessions.auth(request);
-	const user = session.get('user');
-	if (!user) {
+	try {
+		const { user } = await context.sessions.auth(request);
+		await context.db
+			.update(users)
+			.set({
+				onboarded: true,
+			})
+			.where(eq(users.sub, user.subject));
+
+		return redirect('/machines');
+	} catch {
 		return redirect('/login');
 	}
-
-	context.sessions.overrideOnboarding(user.subject, true);
-	return redirect('/machines');
 }