feat(attachments): ensure 'key' is set as UUID on attachment creation and update tests for key validation

app/Domains/Attachable/Services/AttachmentService.php

@@ -8,6 +8,7 @@ use App\Domains\Attachable\Models\Attachment;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Http\UploadedFile;
 use Illuminate\Support\Facades\Storage;
+use Illuminate\Support\Str;
 use Throwable;
 
 class AttachmentService
@@ -32,10 +33,11 @@ class AttachmentService
             throw new AttachmentStorageException('The attachment filename cannot be empty.');
         }
 
+        $key = (string) Str::uuid();
         $storedPath = Storage::disk('s3')->putFileAs(
             $this->directoryFromPath($normalizedPath),
             $file,
-            $filename,
+            $key,
         );
 
         if (! is_string($storedPath) || $storedPath === '') {
@@ -45,6 +47,7 @@ class AttachmentService
         try {
             /** @var Attachment $attachment */
             $attachment = $attachable->attachments()->create([
+                'key' => $key,
                 'path' => $storedPath,
                 'filename' => $filename,
                 'type' => $type,