[FIX] hr_attendance_modification_tracking: add create_multi

[ng-ife]

This looks like a migration issue

Enable batch creation of records by applying the @model_create_multi decorator, improving performance when creating multiple records at once.

[OCA-git-bot]

This PR has the approved label and has been created more than 5 days ago. It should therefore be ready to merge by a maintainer (or a PSC member if the concerned addon has no declared maintainer). 🤖