record registration ip and date in the server-side DB for usage analytics

shared/data.go

@@ -17,6 +17,12 @@ type EncHistoryEntry struct {
 type Device struct {
 	UserId   string `json:"user_id"`
 	DeviceId string `json:"device_id"`
+	// The IP address that was used to register the device. Recorded so
+	// that I can count how many people are using hishtory and roughly
+	// from where. If you would like this deleted, please email me at
+	// david@daviddworken.com and I can clear it from your device entries.
+	RegistrationIp   string    `json:"registration_ip"`
+	RegistrationDate time.Time `json:"registration_date"`
 }
 
 const (