docs: record di and local validation updates

CHANGELOG.md

@@ -23,6 +23,10 @@ A `### Breaking` section is used in addition to Keep a Changelog's standard sect
 
 ### Changed
 
+- Refactored `internal/vociferate` to use a constructor-backed service with injected filesystem, environment, and git dependencies while preserving the existing package-level API.
+- Hardened `prepare-release` validation to enforce formatting checks, module hygiene, `gosec`, and `govulncheck` before preparing a release.
+- Added matching local validation targets in `justfile` for formatting, module hygiene, tests, and security checks.
+
 ### Removed
 
 ### Fixed