feat(content): promote Duncarrow; build client/server artifacts

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HuHRPE7VfppUJEaoGBEUqZ

content/world/canon/disposition-ladder.json

@@ -0,0 +1,13 @@
+{
+  "body": "NPC trust toward the player is one of five ordered states: hostile < cold < neutral < warm < trusted. Where a given player sits with a given NPC is runtime state owned by code. The ladder itself is canon. Every knowledge-link gate references one of these five names, plus the special gate `never` (fact is known but never revealed through dialogue at any rung).",
+  "id": "rule.disposition-ladder",
+  "related": [],
+  "rungs": [
+    "hostile",
+    "cold",
+    "neutral",
+    "warm",
+    "trusted"
+  ],
+  "type": "rule"
+}