OpenBackup v1.0.0

First major release.\n\n- Added a polished desktop dashboard and verified restore workflow.\n- Added persisted backup profiles and schedules.\n- Added unattended execution and Windows Task Scheduler integration.\n- Added configurable retention controls and safe old-snapshot cleanup.\n- Added local activity logging with an in-app viewer.\n- Added automated coverage for snapshots, restores, scheduling, unattended runs, and retention.\n- Included grouped source package OpenBackup-010.