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## Why Loaded threads, including idle threads whose rollout files are still deferred, need to survive a managed daemon restart. Shutdown must also remain forceable when rollout I/O is blocked. ## What changed - Add a hidden `--managed-daemon` option for app-server Unix socket transports. After active turns and admitted requests drain, save loaded persistent root threads before exiting. - Skip ephemeral threads, non-root agent threads, and threads pending unload. Log persistence failures and continue saving other threads. - Apply shutdown admission checks to thread and turn settings updates, thread deletion, and archiving. - Keep force signals and daemon shutdown requests responsive during persistence. Return `AppServerExit::Forced` so executables can exit without waiting for runtime teardown. ## Testing Add integration coverage for resuming active and idle threads after restart, forcing shutdown during active work, and forcing shutdown with a blocked rollout writer. Extend shutdown rejection coverage to deletion and settings updates. GitOrigin-RevId: 4344e97d39f9f80c5d84c41c17300fd6aa99b4cc