Adding Rack information into a Device will cause Diode to create duplicate Rack objects every time.

### Diode SDK Python version

1.3.0

### Diode version

v1.2.0

### Diode NetBox Plugin version

v1.1.0

### NetBox version

v4.2.9

### Steps to reproduce

Add a Rack object to a Device object and add to Netbox.

### Expected behavior

Use an existing rack object in Netbox that matches the name and Site.

### Observed behavior

Duplicated Rack objects.