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/topics/militia-never-investigates.json

@@ -0,0 +1,8 @@
+{
+  "id": "fact.militia-never-investigates",
+  "related": [
+    "town.duncarrow",
+    "rumor.travelers-go-missing"
+  ],
+  "type": "fact"
+}