Simplify stage and Audita contracts

docs/roadmap/implementation.md

@@ -1014,6 +1014,8 @@ stabilized and place static Audita policy in its constructor.
 tests, search for removed symbols/TODOs/stale request fields, and confirm public
 package documentation matches the remaining contract.
 
+**Status:** Completed.
+
 ## Stage 31 — Enforce CI validation and streamline the assembled test suite
 
 **Read first:** `audit-findings.md` lines 3822–3836 (TST-012) and 3869–3885