fix: remove blocking instant_remote_process and hide button during download

The first click did nothing because instant_remote_process() blocked the
Livewire response, preventing UI state updates. The button also remained
visible during download, allowing multiple clicks.

- Replace blocking instant_remote_process() with async command in queue
- Add container cleanup to command queue with error suppression
- Hide "Download & Prepare" button when s3DownloadInProgress is true
- Button now properly disappears when clicked, preventing double-clicks
- No more blocking operations in downloadFromS3() method

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

resources/views/livewire/project/database/import.blade.php

@@ -138,7 +138,7 @@
                         </x-forms.button>
                     </div>
 
-                    <div x-show="s3FileSize && !s3DownloadedFile" class="pt-2">
+                    <div x-show="s3FileSize && !s3DownloadedFile && !s3DownloadInProgress" class="pt-2">
                         <div class="text-sm">File found in S3 ({{ formatBytes($s3FileSize ?? 0) }})</div>
                         <div class="flex gap-2 pt-2">
                             <x-forms.button class="w-full" wire:click='downloadFromS3'>