Add DeletedFiles on WebhookImportPayload

Expose DeleteFiles so it matches the model provided by Radarr/Sonarr
Used to trigger remove of file when upgrading

src/NzbDrone.Core/Notifications/Webhook/Webhook.cs

@@ -63,6 +63,11 @@ namespace NzbDrone.Core.Notifications.Webhook
                 DownloadId = message.DownloadId
             };
 
+            if (message.OldFiles.Any())
+            {
+                payload.DeletedFiles = message.OldFiles.ConvertAll(x => new WebhookTrackFile(x));
+            }
+
             _proxy.SendWebhook(payload, Settings);
         }
 

src/NzbDrone.Core/Notifications/Webhook/WebhookImportPayload.cs

@@ -7,6 +7,7 @@ namespace NzbDrone.Core.Notifications.Webhook
         public WebhookArtist Artist { get; set; }
         public List<WebhookTrack> Tracks { get; set; }
         public List<WebhookTrackFile> TrackFiles { get; set; }
+        public List<WebhookTrackFile> DeletedFiles { get; set; }
         public bool IsUpgrade { get; set; }
         public string DownloadClient { get; set; }
         public string DownloadId { get; set; }