Stage 43 — API Logout / Token Revocation

Upload this package into the existing public installation. Do not import SQL.

Test URL:
https://ieduportal.com/school-management-system/public/upgrade/stage43.php

The test logs in with admin101/admin101, calls /api/v1/permissions/, POSTs /api/v1/auth/logout/, then confirms the same token receives HTTP 401 afterward.
