chore: add missing changelog entries

[mmols]

Summary

Fixup missing changelog entries for the next release:

✗ changie batch minor --dry-run
## v0.6.0 - 2025-12-17

### Added

- "remove-host" now has a "force" attribute that allows users to recover from the loss of one or more hosts.
- Added support for new extensions in standard pgEdge Enterprise Postgres image, including pgedge_vectorizer, pg_tokenizer, vchord_bm25, pg_vectorize, pgmq, pg_cron, and pg_stat_monitor.

### Fixed

- Added validation to the "get-join-options" endpoint to ensure incoming host IDs are unique within the cluster.