Fix SPINE Discovery Messages with spaces not being sent to the frontend

[julispace]

SPINE nodeManagementDetailedDiscoveryData messages may contain fields such as "description" or "label" with spaces in them e.g. https://github.com/enbility/devices/blob/main/elli/charger-connect-pro/discovery-data.json#L242

The devices-app can receive these messages perfectly fine but fails to forward them to the frontend due to this:

func (c *Cem) filterSpineLogs(msg string) {
	parts := strings.Split(msg, " ")
	if len(parts) != 3 {
		return
	}
        ....

The frontend throws an error when attempting to parse the incomplete messages.