Shapes sent via GC are missing a device UID

[FarrantAlex]

CoT messages sent through GeoChat should contain the sender's UID for attribution. The circle, polyline, polygon and telestration only contain a UUID for the shape but not a device UID for attribution. As a result, these event types could be abused deliberately or accidentally to congest a network which would evade client dashboard monitoring which uses a device UID to generate client metrics.

To test this:

1. Create a circle or polygon using the drawing tools
2. Send the shape to another user on Geochat - or broadcast it
3. Observe the circle has a UUID but is anonymous

Please can you add a device UID to shape messages so we don't have anonymous XML messages.