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
Resume GPT sessions when the last assistant reply ends in a permission-seeking tail, while honoring stop-continuation and avoiding duplicate continuation across todo and atlas flows.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
YeonGyu-Kim