Prevent uploading of too long file name

Too long file name can break backups, see issue > #254215 (closed)

In this MR > !69500 (merged), we have prevented "too long file name" from being submitted to the uploads endpoint. However, a long file name can still render a successful response.

I think it might be helpful to prevent this on the backend from successfully saving "too long file name". And have a guard to not allow this from happening 💂‍♂️