Scope update from repo-scoping refactor

SCOPE.md

@@ -30,7 +30,7 @@ Railiance is structured as five independent repos per OAS Stack layer. This repo
 
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-## Out of Scope (per ADR-003)
+## Out of Scope
 
 - OS security hardening, SSH, firewall → railiance-infra (S1)
 - Platform services (PostgreSQL HA, Valkey, object storage) → railiance-platform (S3)
@@ -82,7 +82,7 @@ Railiance is structured as five independent repos per OAS Stack layer. This repo
 
 ---
 
-## Related / Overlapping Repositories
+## Related / Overlapping
 
 - `railiance-infra` (S1) — must be converged before this layer runs
 - `railiance-platform` (S3) — consumes the cluster runtime provided by S2