Upload file to bucket with metadata from client side

const { data, error } = await supabase.storage
  .from('bucket')
  .upload('path/file.txt', file, {
    metadata: { filename: 'My Real Filename.txt' }
  });

const { data } = await supabase.storage.from('bucket').list('folder');
console.log(data[0].metadata); // Only system metadata, no custom fields