CVE-2026-47229: Admidio: CSRF in SSO client `enable` action toggles SAML/OIDC clients without token validation

modules/sso/clients.php validates an adm_csrf_token on every state-changing branch except enable. The enable case loads the SAML or OIDC client by UUID, calls $client->enable($enabled), and persists the new state with no token check. Because the action is reachable via plain GET parameters, a third-party page can trick an authenticated administrator into disabling (or silently re-enabling) any configured SAML or OIDC client. Disabling an SSO client breaks every downstream relying-party application that authenticates through it.