diagnostics: System → Diagnostics with a network test probe; RTP_PORT_START/END

The server checks itself (public IP, DNS, local networks, phone ACL, SIP transports, free audio
ports) and says how to fix each problem. A quick or complete network test asks the probe
(apps/probe, own image) to test this server from outside: HTTP/HTTPS, SIP over UDP/TCP/TLS, the
browser phone's /ws, sampled audio ports. The probe only tests the address that asks.
The audio port range comes from RTP_PORT_START/END (default 10000-20000).

pnpm-lock.yaml

@@ -88,6 +88,8 @@ importers:
         specifier: ^0.31.11
         version: 0.31.11
 
+  apps/probe: {}
+
   apps/web:
     dependencies:
       '@hookform/resolvers':