Add https://isitup.lotusguild.org to connect-src so the client can fetch
the public status JSON (GET /api/status-page/matrix and
/api/status-page/heartbeat/matrix) for the homeserver status banner.
Read-only public JSON, no credentials; nothing else changes.
The live snippet (/etc/nginx/snippets/cinny-security-headers.conf on
LXC 106) was identical to this file before the change; install it by hand
with a backup and `nginx -t` (the deploy script only handles
cinny/nginx.conf).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA