Harden installer update activation fallback

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2026-08-24 12:53:35 +02:00
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15 changed files with 196 additions and 31 deletions
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# Changelog
## [2.2.3] - 2026-08-24
### Fixed
- A persistent Windows/EDR denial of the final staging-directory rename no longer aborts activation after an existing installation has already been atomically moved to its backup.
- The SHA-256-verified copy fallback now covers both first installation and update activation, while refusing to overwrite an existing target or an update without a completed backup.
### Added
- Regression coverage for successful update copy fallback and complete restoration of the previous version when the post-copy target self-test fails.
- PROD incident analysis and a plain-text operator handoff for the observed 2.1.2 `SETUP-ACTIVATION` failure.
## [2.2.2] - 2026-08-19
### Fixed
- A failure in the optional GUI log sink can no longer escape step-level error handling or stop later independent shutdown/restore steps.