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

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+{
+  "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"
+}

content/world/canon/duncarrow.json

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+{
+  "body": "Duncarrow is a walled market town at the edge of the Tallow Reach, grown fat on the road trade between the lowland grain towns and the pass. Timber and wool go out; salt, iron, and coin come in. Ten militia hold the walls under the mayor's charter. It is, by every visible measure, a prosperous and orderly place, which is exactly the reputation its mayor has spent fifteen years building and depends on.",
+  "id": "town.duncarrow",
+  "related": [
+    "region.the-tallow-reach",
+    "place.the-white-antlers",
+    "person.mayor-oswin-crell"
+  ],
+  "type": "town"
+}

content/world/canon/elves.json

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+{
+  "body": "The elven travellers of the road \u2014 no single polity, but the people whose passage through the White Antlers, and its recent absence, the town notices.",
+  "id": "faction.elves",
+  "related": [],
+  "type": "faction"
+}

content/world/canon/mayor-oswin-crell.json

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+{
+  "body": "Mayor of Duncarrow for fifteen years. Warm, unhurried, remembers names and the names of your dead. Runs a clean council and a clean set of books. Widely liked. The visible locked door of this town: pleasant to every player at every disposition, and revealing of nothing.",
+  "id": "person.mayor-oswin-crell",
+  "related": [
+    "town.duncarrow"
+  ],
+  "type": "person"
+}

content/world/canon/the-tallow-reach.json

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+{
+  "body": "The Tallow Reach \u2014 the lowland march of grain towns and wool roads that Duncarrow sits at the edge of, feeding the pass trade.",
+  "id": "region.the-tallow-reach",
+  "related": [],
+  "type": "region"
+}

content/world/canon/the-white-antlers.json

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+{
+  "body": "An old elven shrine a half-hour's walk north of Duncarrow, in the birch stand off the pass road. Weathered antler-carvings, a dry basin, nothing worth stealing. Elves on the road have historically stopped here. Locals know it as a curiosity and a good spot to water horses.",
+  "id": "place.the-white-antlers",
+  "related": [
+    "town.duncarrow",
+    "faction.elves"
+  ],
+  "type": "place"
+}