feat(attachments): update filename generation in AttachmentService to include file extension

app/Domains/Attachable/Services/AttachmentService.php

@@ -32,7 +32,7 @@ class AttachmentService
         $storedPath = Storage::disk('s3')->putFileAs(
             $this->directoryFromPath($normalizedPath),
             $file,
-            $key,
+            $this->buildStoredFilename($key, $file),
         );
 
         if (! is_string($storedPath) || $storedPath === '') {
@@ -120,4 +120,15 @@ class AttachmentService
 
         return AttachmentType::Other;
     }
+
+    protected function buildStoredFilename(string $key, UploadedFile $file): string
+    {
+        $extension = strtolower($file->getClientOriginalExtension() ?: $file->extension() ?: '');
+
+        if ($extension === '') {
+            return $key;
+        }
+
+        return $key.'.'.$extension;
+    }
 }