PixEagle v7.0.0-beta.29

Guided update recovery candidate. Interactive updates can confirm and stop an exactly owned PixEagle runtime, known generated dashboard backups are preserved without blocking source updates, long operations report liveness, settings-reset validation is quiet and transactional, and MAVSDK dependencies use reviewed reproducible pins. Local installer/lifecycle, API, schema, dashboard, shell, and documentation gates passed. Fresh Ubuntu and Raspberry Pi acceptance remain pending.