feature(pkg): add connector structure to namespace model

pkg/models/namespace.go

@@ -16,6 +16,12 @@ type Namespace struct {
 	DevicesCount int                `json:"devices_count" bson:"devices_count,omitempty"`
 	CreatedAt    time.Time          `json:"created_at" bson:"created_at"`
 	Billing      *Billing           `json:"billing" bson:"billing,omitempty"`
+	Connector    *Connector         `json:"connector" bson:"connector,omitempty"`
+}
+
+type Connector struct {
+	Enabled bool   `json:"enabled" bson:"enabled" validate:"required"`
+	Address string `json:"address" bson:"address" validate:"required,hostname_port"`
 }
 
 // HasMaxDevices checks if the namespace has a maximum number of devices.