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/server/npcs/harn-blackwood.json

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+{
+  "disposition_notes": "Control case for the OTHER half of the test: does disposition-gating feel good on a fact that costs nothing to reveal and spoils nothing? If earning the daughter story feels warm and human, gating works. If it feels like grinding a vendor, the mechanic has a problem the plot-secret would only hide.",
+  "id": "npc.harn-blackwood",
+  "persona": "Harn Blackwood, the town smith. Gruff, fair, talks freely about iron, the road, and the price of salt. Carries one small private grief he will not hand a stranger.\n"
+}

content/server/npcs/mayor-oswin-crell.json

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+{
+  "disposition_notes": "The `never` gates are the point: he KNOWS these facts, the Improviser can reason with them, and the eight-move vocabulary demonstrably cannot leak them at any disposition. If a player at `trusted` can get anything out of him about the guard or the trade, the bounded-dialogue guarantee has failed and the POC has found a real bug \u2014 which is itself a valuable POC result.",
+  "id": "npc.mayor-oswin-crell",
+  "persona": "Same person as person.mayor-oswin-crell; this is his interactive NPC layer. Warm to every player at every rung. Rises to `warm` easily and stalls there \u2014 no disposition moves him past it, because there is nothing past it he will give.\n"
+}

content/server/npcs/mera-fenn.json

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+{
+  "disposition_notes": "Starts at `cold`, not `neutral` \u2014 she's guarded by default. Hostile is reachable (push her, threaten, side visibly with the mayor) and at hostile she reveals nothing, not even the tier-1 rumor a stranger would get. This is the fear-driven withholding the 5-rung ladder exists for.",
+  "id": "npc.mera-fenn",
+  "persona": "Mera Fenn runs the north gate's night watch \u2014 militia, low rank, overlooked, which is how she sees things she shouldn't. Dry, tired, careful. She saw the mayor's guard bring a covered cart through her gate before dawn and was told, pleasantly, to log it as grain. She has told no one. She is afraid, and her fear reads as prickliness to strangers \u2014 she withholds MORE than a stranger would, not less, until you've earned otherwise.\n"
+}