feat: simplify RBAC roles and remove dev role switcher

- Simplified RBAC system to two roles: super_admin and user.
- Removed tenant_admin and rp_admin roles across backend and frontend.
- Removed Dev Role Switcher feature from adminfront.
- Updated all handlers, middlewares, and navigation to reflect the new role model.
- Fixed backend build errors and updated tests.

adminfront/src/features/users/UserListPage.tsx

@@ -246,7 +246,7 @@ const UserListSearchControls = React.memo(function UserListSearchControls({
             className="flex h-9 w-[160px] rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:opacity-50"
             value={selectedCompany}
             onChange={(event) => onCompanyChange(event.target.value)}
-            disabled={profileRole === "tenant_admin"}
+            disabled={profileRole !== "super_admin"}
           >
             <option value="">{t("ui.common.all", "전체 테넌트")}</option>
             {tenantOptions}