feat: remove Data Completeness module

src/components/Sidebar.tsx

@@ -10,7 +10,6 @@ interface SidebarProps {
 export function Sidebar({ activeModule, setActiveModule }: SidebarProps) {
   const navItems = [
     { id: 'descriptions', label: 'Product Descriptions', icon: FileText },
-    { id: 'completeness', label: 'Data Completeness', icon: CheckSquare },
     { id: 'matrix', label: 'Matrix', icon: Table },
     { id: 'upload', label: 'Upload / Reload', icon: Upload },
   ] as const;