Please explain why Godaddy modified wordpress files

I’m hosting a WordPress website for a client on Godaddy managed WordPress hosting, they picked that hosting. Godaddy is integrated inside the admin area.

Today I received this email from wordfence

High Severity Problems:
* Unknown file in WordPress core: wp-includes/meta.php.orig
* Unknown file in WordPress core: wp-includes/post.php.orig
* Unknown file in WordPress core: wp-includes/taxonomy.php.orig
* WordPress core file modified: wp-includes/class-wp-post.php
* WordPress core file modified: wp-includes/class-wp-query.php
* WordPress core file modified: wp-includes/meta.php
* WordPress core file modified: wp-includes/post.php
* WordPress core file modified: wp-includes/taxonomy.php

Diffing the changes via wordfence I see these changes

I can’t even revert back or delete the files from within wordfence, it’s a read only filesystem. I don’t understand why they did it or how since it’s a read only filesystem. I don’t even understand what those orig files are, maybe a backup before they edited the files.

I have another website for someone else, also hosted on Godaddy managed VPS, I didn’t encounter such issue. Anyone hosting who has encountered this issue?