Record Notarius retry validation

docs/roadmap/implementation.md

@@ -90,6 +90,8 @@ progress separately as `Record the Notarius upgrade in progress`.
 
 ## Stage 2: Test Optional Retry Rendering and Retain Existing Outcomes
 
+Completion: complete (2026-09-28).
+
 ### Required Policy Review
 
 Read workspace `AGENTS.md`, `docs/orientation.md`, `docs/conventions.md`,
@@ -220,6 +222,12 @@ Plan approved.
   `git diff --check` passed. The role diff contains only defaults, argument
   specifications, the configuration template, and README; no production task
   or suite pin changed.
+- Stage 2: `bash -n` and the local integration harness passed. Parsed rendered
+  YAML confirms null omission and retry-only zero; native validation and
+  effective configuration confirm zero in both retry-only and representative
+  cases. Existing v0.7.0 selection, supplied-Go recovery, imports, pipelines,
+  cache behavior, and clean immediate repeats passed. Role `git diff --check`
+  passed.
 
 ## Open Questions