Retain repair diagnostics and correction lineage

docs/roadmap/implementation.md

@@ -322,6 +322,8 @@ validator responses remains [deferred](future.md#domain-aware-response-recovery)
 
 ## Stage 8 — Retain optional repair evidence and preserve ledger lineage
 
+**Completed.**
+
 1. Extend the current interaction writers and logical execution observation
    data with a repair role, original proposal index, and one-based semantic
    attempt number. Use generated stage instance, section, proposal, and