Pause, cancel & resume backup media download

ts/sql/Interface.ts

@@ -852,6 +852,7 @@ type WritableInterface = {
   getNextAttachmentDownloadJobs: (options: {
     limit: number;
     prioritizeMessageIds?: Array<string>;
+    sources?: Array<AttachmentDownloadSource>;
     timestamp?: number;
   }) => Array<AttachmentDownloadJobType>;
   saveAttachmentDownloadJob: (job: AttachmentDownloadJobType) => void;