MedLearn Release Notes v2.9.0

refactor: adding more columns to the spreadsheet export for the site theme absence and leave view

refactor: fixing a typo in attendance-actions

refactor: final pass over rewriting wp_mail to use process_email

refactor: Use process_email() for all wp_mail critical places

refactor: initial category report optimisation changes

refactor: completed refactor of SMTP to msgraph emails