Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Prune interval created inside hook was not exposed for disposal, preventing cleanup on plugin unload. - Add dispose() method that clears the prune interval - Export dispose in hook return type Tests: 2 pass, 6 expects
YeonGyu-Kim