Simplify profile null fallback behavior

docs/roadmap/implementation.md

@@ -250,6 +250,10 @@ converters and callers may wait for later stages; do not add transitional fields
 
 ## Stage 2: Simplify Execution's Post-Handoff Null Semantics
 
+**Completed:** Focused configuration tests pass with the locally selected Go
+toolchain. Public resource and retained-provenance assertions for inherited nulls
+remain scheduled with the inspection wiring and isolation checks.
+
 **Scope:** Profile capture and its targeted configuration tests.
 
 1. In `internal/configuration/targets.go`, implement the pointer-based behavior