Box.getSpace(address, spaceName, opts) with metaData opts passed returns null timestamp

I'm pretty sure this was working when it was implemented into the Hub app.
Now, hitting this end point with `const opts = {metadata: true };` returns an object with `timestamp` value as null (value of key is correctly returned, however).

Expect:
```
{
value: ,
timestamp:
}
```

Look for the Box.getSpace method in the codebase, likely in a file handling API endpoints or the Box class. Examine how metadata options are processed and where the timestamp is retrieved. Check database queries or storage layer to ensure the timestamp field is being fetched correctly. Verify the issue by writing a test that reproduces the null timestamp with metadata: true.

索引モデルが issue の本文から書いたものです。