fix disappearing network devices

src/db/models/wireguard.rs

@@ -420,7 +420,11 @@ impl WireguardNetwork<Id> {
     ) -> Result<Vec<GatewayEvent>, WireguardNetworkError> {
         info!("Synchronizing IPs in network {self} for all allowed devices ");
         // list all allowed devices
-        let allowed_devices = self.get_allowed_devices(&mut *transaction).await?;
+        let mut allowed_devices = self.get_allowed_devices(&mut *transaction).await?;
+        // network devices are always allowed
+        let network_devices = Device::find_by_type(&mut *transaction, DeviceType::Network).await?;
+        allowed_devices.extend(network_devices);
+
         // convert to a map for easier processing
         let mut allowed_devices: HashMap<Id, Device<Id>> = allowed_devices
             .into_iter()