feat(example): add per-entity LLM evaluations for 985 WoN entities (S3.3)

Batch evaluation of all 988 entities via OpenRouter. 984 succeeded on
first pass; 3 failed (network errors). eval-summary --update-metrics
written with per_entity_mean=3.9556.

Viability dashboard: 6/6 PASS
  redundancy_ratio   0.0061  (max 0.10)
  coverage_ratio     0.6190  (min 0.40)
  coherence_comps    0.0000  (max 3)
  consistency_cycles 0.0000  (max 0)
  granularity_entropy 2.6748 (min 1.0)
  per_entity_mean    3.9556  (min 3.5)

Dimension breakdown (mean across 985 entities):
  definition_precision  3.62
  source_grounding      4.36
  domain_placement      4.56
  vsm_relevance         3.31
  explanatory_value     3.94

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

examples/infospace-with-history/output/evaluations/balance_of_trade.md

@@ -0,0 +1,62 @@
+---
+entity_slug: balance_of_trade
+evaluator: null
+evaluated_at: '2026-02-23T00:36:58.273922'
+overall_score: 4.8
+scores:
+- name: definition_precision
+  value: 5.0
+  max_value: 5.0
+  rationale: The definition is mathematically precise (difference between exports
+    and imports) and clearly distinguishes between favorable and unfavorable balances.
+    It avoids circularity and captures a specific, measurable economic concept.
+- name: source_grounding
+  value: 5.0
+  max_value: 5.0
+  rationale: This entity is directly grounded in Book IV, Chapter 1, where Smith extensively
+    discusses and critiques the mercantile system's obsession with trade balances.
+    The definition accurately reflects Smith's treatment of how mercantilist thinking
+    connected trade balances to national wealth through precious metal flows.
+- name: domain_placement
+  value: 5.0
+  max_value: 5.0
+  rationale: The "Exchange" domain is perfectly appropriate since balance of trade
+    fundamentally concerns the exchange relationships between nations. This concept
+    sits at the heart of international commercial exchange theory.
+- name: vsm_relevance
+  value: 4.0
+  max_value: 5.0
+  rationale: This entity maps well to S4 (intelligence/environmental adaptation) as
+    it represents how a nation monitors and responds to its external economic environment
+    through trade relationships. It also connects to S5 (policy) since trade balance
+    concerns often drive national economic policy decisions.
+- name: explanatory_value
+  value: 5.0
+  max_value: 5.0
+  rationale: This entity provides substantial explanatory power by illuminating the
+    fundamental mechanism underlying mercantile economic thinking and policy formation.
+    It reveals the structural relationship between international trade flows and how
+    societies conceptualize national wealth accumulation.
+---
+
+# Evaluation: Balance Of Trade
+
+## definition_precision — 5.0 / 5.0
+
+The definition is mathematically precise (difference between exports and imports) and clearly distinguishes between favorable and unfavorable balances. It avoids circularity and captures a specific, measurable economic concept.
+
+## source_grounding — 5.0 / 5.0
+
+This entity is directly grounded in Book IV, Chapter 1, where Smith extensively discusses and critiques the mercantile system's obsession with trade balances. The definition accurately reflects Smith's treatment of how mercantilist thinking connected trade balances to national wealth through precious metal flows.
+
+## domain_placement — 5.0 / 5.0
+
+The "Exchange" domain is perfectly appropriate since balance of trade fundamentally concerns the exchange relationships between nations. This concept sits at the heart of international commercial exchange theory.
+
+## vsm_relevance — 4.0 / 5.0
+
+This entity maps well to S4 (intelligence/environmental adaptation) as it represents how a nation monitors and responds to its external economic environment through trade relationships. It also connects to S5 (policy) since trade balance concerns often drive national economic policy decisions.
+
+## explanatory_value — 5.0 / 5.0
+
+This entity provides substantial explanatory power by illuminating the fundamental mechanism underlying mercantile economic thinking and policy formation. It reveals the structural relationship between international trade flows and how societies conceptualize national wealth accumulation.