feat: enhance backup and restore functionality with integrity checks and progress tracking

- Added support for backup integrity verification during export and restore processes.
- Introduced progress dispatching for backup export and restore operations.
- Implemented new API endpoints for inspecting remote backup integrity.
- Enhanced user interface with progress indicators and warning dialogs for integrity issues.
- Updated localization strings for new features and user feedback.
- Refactored backup-related functions for better clarity and maintainability.

src/router-admin-backup.ts

@@ -6,6 +6,7 @@ import {
   handleDownloadAdminBackupAttachment,
   handleGetAdminBackupSettings,
   handleGetAdminBackupSettingsRepairState,
+  handleInspectAdminRemoteBackup,
   handleAdminImportBackup,
   handleListAdminRemoteBackups,
   handleRepairAdminBackupSettings,
@@ -53,6 +54,10 @@ export async function handleAdminBackupRoute(
     return handleDownloadAdminRemoteBackup(request, env, actorUser);
   }
 
+  if (path === '/api/admin/backup/remote/integrity' && method === 'GET') {
+    return handleInspectAdminRemoteBackup(request, env, actorUser);
+  }
+
   if (path === '/api/admin/backup/remote/file' && method === 'DELETE') {
     return handleDeleteAdminRemoteBackup(request, env, actorUser);
   }