Upgrade Sendy to Latest Release

I’m running Sendy version 6 on a completely standard installation—no plugins, hacks, or theme tweaks hiding in the codebase. I’d like you to take me safely to the newest stable release provided by Sendy, carrying across every list, subscriber, template, automation, and report without interruption to sending.

A clean, full-disk and database backup must be taken before we start. Once the update is complete, I need to see the new version number in the dashboard and be able to:

• send a test campaign successfully through my existing AWS SES setup
• confirm that scheduled CRON jobs still trigger as expected
• verify that all historical reports render correctly

Please document the exact steps you follow so I have a reference for future upgrades. If any PHP extensions, file permissions, or server tweaks are required, note them clearly.

Deliverable: a fully upgraded, tested, and functioning Sendy installation with a brief upgrade log.