feat: OBS-399 - netbox diode plugin to listen on post_save signals

[Julio-Oliveira-Encora]

It adds a method to call the SDK when receiving the post-save signal.

[linear]

OBS-399 NetBox diode plugin to listen on post_save django events/signals

Listen to the NetBox post_save events/signals and notify reconciliation service about observed objects changes via diode python sdk communicating with ReconcilerService.AddObjectState gRPC method.

• utilise python's DiodeReconcilerClient to send data into reconciler service - see https://github.com/netboxlabs/diode/blob/develop/diode-server/proto/reconciler/v1/reconciler.proto#L45-L54

  i.e. example object to send for dcim.site type (mind the current discrepancy between dcim.site for object_type and site in the object root field, we will make it more consistent later on)

{
  "site": {
    "id": 1,
    "name": "test-device",
    "slug": "test-device",
    "url": "http://localhost:8000/api/dcim/sites/1/"
  }
}