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Eric Traut
0960e379a5
## What changed - Record the current and previous dedicated daemon selections in `selection-history`, bound to the selection link's identity. Preserve that history when an install leaves the selection unchanged. - Prune unused releases after package preparation and scheduled update processing, including updates that require no restart. Retain the current and previous selections, packages used by the daemon or updater, and the calling executable's package. - Require lifecycle and installer locks, valid selection history, and verified package boundaries before cleanup. Skip unsafe or unrecognized packages and retire releases before best-effort deletion so partial failures are not retried. - Resolve the updater's actual executable identity after an executable handoff that preserves its PID. ## Testing Extend coverage for stale selection history, retention of the last two selections, packages containing external symlinks, partial deletion and reinstall, cleanup without restarting the daemon, and repeated installs preserving selection history. GitOrigin-RevId: 19a04db1cc356a2219f2afb137b9525e249ab6fb