refactor(client-portal) : remove client portal feature entirely

- drop ClientPortal module, ClientTicket entity, ROLE_CLIENT and all couplings (Task, TaskDocument, User, Notification) back to an internal-only model

- migration drops client_ticket / user_allowed_projects / related FK columns and removes leftover external client accounts (would otherwise be promoted to ROLE_USER)

- remove client-portal frontend module, admin tickets tab, user portal section, portal nav item and portal/clientTicket i18n keys

- fix directory nav icon (invalid mdi:contact-multiple-outline -> mdi:card-account-details-outline)

- add 'make sync-permissions' target, wire it into install/db-reset and the prod deploy script

infra/prod/deploy.sh

@@ -27,6 +27,9 @@ sudo docker compose cp app:/var/www/html/public/maintenance.html public/maintena
 echo "==> Running migrations..."
 sudo docker compose exec -T -u www-data app php bin/console doctrine:migrations:migrate --no-interaction
 
+echo "==> Syncing RBAC permissions catalog..."
+sudo docker compose exec -T -u www-data app php bin/console app:sync-permissions
+
 echo "==> Clearing cache..."
 sudo docker compose exec -T -u www-data app php bin/console cache:clear --env=prod
 sudo docker compose exec -T -u www-data app php bin/console cache:warmup --env=prod