Rewrite NPC plans around the Quaternius base

docs/adr/0015-npc-model-variety-sourcing.md

@@ -1,8 +1,14 @@
 # ADR-0015: NPC model variety sourcing
 
-- **Status:** Accepted (planning)
+- **Status:** Superseded by [ADR-0017](0017-quaternius-npc-base.md) (2026-11-05)
 - **Date:** 2026-11-03
 
+## Superseded
+
+ADR-0017 replaces the generator-first decision below: Quaternius is now the
+primary NPC base. The evaluation, licence rules and consequences remain as the
+record of the 2026-11-03 decision.
+
 ## Context
 
 The library has eight skinned characters, and role/seed selection reuses them