Date set to 1970-01-01 01AM when using the Checkin All / Delete User option.

[InfiLatro]

Description

In 7.1.13, 7.1.14 and 7.1.16, when you Checkin All / Delete User, all accessories and consumables have a 1970-01-01 1:00AM date as created_at. Assets do show with correct date.
I check the code and the created_at property has the logged in user assigned. That property should change to created_by instead of created_at, like for ItemCheckin.

Steps to Reproduce

Update Snipe-IT to v7.1.16.
Perform the Checkin All / Delete User on an active user with at least 1 accessory and consumable. 
Check the history of the deleted user to see the accessory and consumable having a 1970-01-01 1:00AM date.

Expected Behavior

History logs for checkin accessories and consumables should have the current date.

Actual Behavior

History logs for checkin accessories and consumables have 1970-01-01 1:00AM as date. Assets are ok.

Environment

Snipe-IT Version: v7.1.16 build 16564 (gfb857ccf5)
Operating System: Ubuntu 24.04.1 LTS (GNU/Linux 6.8.0-51-generic x86_64)
Web Server: Apache2
PHP Version: 8.3.6
Database Version: mysql 8.0.40-0ubuntu0.24.04.1 for Linux on x86_64 ((Ubuntu))
Browsers: Firefox and Chrome

[welcome]

👋 Thanks for opening your first issue here! If you're reporting a 🐞 bug, please make sure you include steps to reproduce it. We get a lot of issues on this repo, so please be patient and we will get back to you as soon as we can.