Add docs/THIRD_PARTY_NOTICES.md for the bundled list-unsubscribe-header
plugin (AGPL-3.0, upstream GitHub). Link from README. Add CPScripts helper
to sync the plugin from a local snappymail-plugins checkout into install/.
- Updated OS detection logic to include CentOS Stream and Red Hat Enterprise Linux.
- Added support for AlmaLinux 9 and 10, as well as Debian 11, 12, and 13.
- Improved error messages to reflect the expanded list of supported operating systems.
- Adjusted package management handling for Debian to treat it as Ubuntu for compatibility.
- CPScripts/ensure_ftp_users_quota_columns.py checks information_schema and
ALTER TABLE users ADD COLUMN for custom_quota_enabled and custom_quota_size
when missing (fixes MySQL 1054 on FTP account creation).
- deploy-ftp-users-custom-quota-columns.sh copies script to CyberCP and runs
repair; restarts lscpd when active.
- upgrade_modules/10_post_tweak.sh runs the repair after upgrade sync.
- Changed repository URLs in the CyberPanel upgrade script and related installation scripts to use HTTPS for improved security.
- Updated the `mailscannerinstaller.sh` and `spamassassin_tojunk_installer.sh` scripts to reflect the new secure URLs.
- Modified the `install.py` script to include an additional parameter in the `update_settings_file` method for better password management.
