node: Provice initial set of telemetry data
In order to gain a better understanding of a seed's utilization, it would be great to implement OpenTelemetry on the node and start with sending two metrics: inbound and outbound connections.
Alternatively, we can think of providing a workaround
On the node, run this in a cron job and collect the data in a textfile.
echo '{"command": "sessions"}' | socat - UNIX-CONNECT:/Users/yorgos/.radicle/node/control.sock | grep '"state":{"connected"' | jq '.[] | select(.state | objects | has("connected")) | .nid' | sort | uniq | wc -l