docs: add changelog entry for review_depth: lightweight

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: sansari

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- `review_depth: lightweight` annotation for review blocks in `job.yml` step outputs and `.deepreview` rules — when set, the workflow's `common_job_info` preamble is omitted from review instruction files, reducing token overhead for trivial or reversible intermediate steps (closes #86)
+
 ### Changed
 
 ### Fixed