feat(lab-04): Nextcloud SSO Integration -- Keycloak OIDC, realm/clien… #9

Job	Run time
Validate Configuration	6s
Lab 02 — Nextcloud LAN (PG, Redis, pgsql backend, Redis config)	0s
Security Scan	0s
Lab 01 — Nextcloud standalone (status.php, occ, WebDAV)	0s
Lab 04 — Nextcloud SSO Integration (Keycloak OIDC)	0s
Lab 03 - Nextcloud Advanced (cron, resource limits, Redis policy)	0s
	6s

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