refactor: mark dead exports with TODO, deduplicate field sanitization, fix import placement

src/lib/cache.ts

@@ -16,6 +16,7 @@ export function cached<T>(
 	});
 }
 
+// TODO: Check of dit weg kan — niet geïmporteerd in de codebase
 export function bustCache(key: string): void {
 	store.delete(key);
 }