Add before_compact hook event (closes #281) (#285)
* Add before_compact hook event (closes #281)
* Add compact hook event and documentation
- Add compact event that fires after compaction completes
- Update hooks.md with lifecycle diagram, field docs, and example
- Add CHANGELOG entry
- Add comprehensive test coverage (10 tests) for before_compact and compact events
- Tests cover: event emission, cancellation, custom entry, error handling, multiple hooks
Nico Bailon