Decide if we want to remove connect_direct interface from iotilegateway

Device monitoring callbacks will work based on uuid so connecting to a device without capturing a UUID first would break the monitoring api.

Start by locating the iotilegateway connect_direct interface and the device-monitoring callback code that relies on UUIDs. Determine whether removing the interface can preserve UUID-based monitoring, then document the decision and any required compatibility changes.

Written by the indexing model from the issue text.