Sync wiki for v1.6.13 traffic quotas and API. Co-authored-by: Cursor <cursoragent@cursor.com>
Sync wiki with docs for v1.6.12 (traffic, nat-info, TLS, update). Co-authored-by: Cursor <cursoragent@cursor.com>
Update wiki for v1.6.7: users, API, backups, multi-S MTProxy.