Resumable backup import

ts/sql/Interface.ts

@@ -983,6 +983,7 @@ export type ServerReadableDirectInterface = ReadableInterface & {
   finishGetKnownMessageAttachments: (
     cursor: MessageAttachmentsCursorType
   ) => void;
+  getKnownDownloads: () => Array<string>;
   getKnownConversationAttachments: () => Array<string>;
 
   getAllBadgeImageFileLocalPaths: () => Set<string>;

ts/sql/Server.ts

@@ -346,6 +346,7 @@ export const DataReader: ServerReadableInterface = {
   finishGetKnownMessageAttachments,
   pageMessages,
   finishPageMessages,
+  getKnownDownloads,
   getKnownConversationAttachments,
 };
 
@@ -6810,6 +6811,17 @@ function finishPageMessages(
   `);
 }
 
+function getKnownDownloads(db: ReadableDB): Array<string> {
+  const result = [];
+
+  const backup = getItemById(db, 'backupDownloadPath');
+  if (backup) {
+    result.push(backup.value);
+  }
+
+  return result;
+}
+
 function getKnownConversationAttachments(db: ReadableDB): Array<string> {
   const result = new Set<string>();
   const chunkSize = 500;