Reduce Windows CI flake for backup attachments test

ts/services/backups/import.ts

@@ -110,6 +110,7 @@ import { getRoomIdFromRootKey } from '../../util/callLinksRingrtc';
 import { reinitializeRedux } from '../../state/reinitializeRedux';
 import { getParametersForRedux, loadAll } from '../allLoaders';
 import { resetBackupMediaDownloadProgress } from '../../util/backupMediaDownload';
+import { getEnvironment, isTestEnvironment } from '../../environment';
 
 const MAX_CONCURRENCY = 10;
 
@@ -415,7 +416,10 @@ export class BackupImportStream extends Writable {
         await DataReader.getSizeOfPendingBackupAttachmentDownloadJobs()
       );
 
-      if (this.backupType !== BackupType.TestOnlyPlaintext) {
+      if (
+        this.backupType !== BackupType.TestOnlyPlaintext &&
+        !isTestEnvironment(getEnvironment())
+      ) {
         await AttachmentDownloadManager.start();
       }
 

ts/test-electron/backup/attachments_test.ts

@@ -122,6 +122,7 @@ describe('backup/attachments', () => {
       received_at_ms: timestamp,
       sourceServiceId: CONTACT_A,
       sourceDevice: 1,
+      schemaVersion: 0,
       sent_at: timestamp,
       timestamp,
       readStatus: ReadStatus.Read,

ts/test-electron/backup/helpers.ts

@@ -80,6 +80,8 @@ function sortAndNormalize(
       sourceDevice: _sourceDevice,
       // eslint-disable-next-line @typescript-eslint/no-unused-vars
       editMessageReceivedAt: _editMessageReceivedAt,
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      schemaVersion: _schemaVersion,
 
       ...rest
     } = message;