refactor(settings): split security into 4 focused tiles

Extracts user-lifecycle, audit and telemetry from the security subpage
into their own tiles, and renames the slimmed-down security subpage to
account-access for a clearer scope. Each subpage now has at most three
detail cards instead of the eight previously crowded into security.

Hub gains four tiles, sub-action redirects (expire-remember-tokens,
run-user-lifecycle) move to their new sections, architecture tests track
the new section list and i18n adds the new labels in de + en.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/Architecture/DetailPageContractFiles.php

@@ -17,7 +17,10 @@ final class DetailPageContractFiles
             'pages/admin/permissions/_form.phtml',
             'pages/admin/scheduled-jobs/edit(default).phtml',
             'pages/admin/settings/general(default).phtml',
-            'pages/admin/settings/security(default).phtml',
+            'pages/admin/settings/account-access(default).phtml',
+            'pages/admin/settings/user-lifecycle(default).phtml',
+            'pages/admin/settings/audit(default).phtml',
+            'pages/admin/settings/telemetry(default).phtml',
             'pages/admin/settings/email(default).phtml',
             'pages/admin/settings/api(default).phtml',
             'pages/admin/settings/sso(default).phtml',