- Replaced the previous node and space management with a channel-based state management system in `manager.go`, enhancing concurrency handling.
- Implemented methods for loading and saving trace updates to disk in `local/driver.go` and `store/driver.go`, allowing for persistent state across sessions.
- Updated subscription handling in `subscription.go` to streamline the process of broadcasting updates to active subscribers.
- Enhanced node and trace status management, including cancellation and completion states, to provide better control over trace execution.
- Adjusted related tests to ensure compatibility with the new state management approach.
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