Archive Audita reports as polish diagnostics

docs/roadmap/implementation.md

@@ -316,7 +316,10 @@ semantic integration; all stages are required before release.
 
 ## Stage 5: Integrate polish reports with diagnostic lifecycle
 
-Status: Not started.
+Status: Complete (2026-09-25).
+
+Verification: `go test ./internal/stage ./internal/app ./internal/manifest ./internal/artifacts`,
+`go test -race ./internal/stage ./internal/app`, and `git diff --check` passed.
 
 Preparation: `internal/stage/polish.go`, `polish_test.go`, `run_local.go`,
 `stage.go`, `publish_sources.go`; result application in `internal/app/runner.go`;