Successful test run on Raspberry Pi 4

[Scrappy]

Quick validation results to share:

- clean install on Pi 4
- deployment of 3 Store apps with no errors
- updates applied with controlled reboot
- rollback tested successfully

The simplicity of the update flow helped a lot during QA.

[PR1000]

Excellent report, Joana. Thank you for detailing the update and rollback scenarios.

If you agree, we can turn this into a pinned tutorial for new users.