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/agricultural_price_differential.md

@@ -0,0 +1,64 @@
+---
+entity_slug: agricultural_price_differential
+evaluator: null
+evaluated_at: '2026-02-23T00:29:16.621568'
+overall_score: 4.4
+scores:
+- name: definition_precision
+  value: 4.0
+  max_value: 5.0
+  rationale: The definition clearly identifies a specific economic mechanism - the
+    price advantage from saved transportation costs for agricultural producers near
+    towns. It avoids circularity and captures a distinct concept with measurable components
+    (same price, reduced costs, resulting differential).
+- name: source_grounding
+  value: 5.0
+  max_value: 5.0
+  rationale: This concept is directly grounded in Smith's analysis in Book III, Chapter
+    1, where he explicitly discusses how proximity to markets affects agricultural
+    profitability and land improvement incentives. The entity accurately reflects
+    Smith's reasoning about spatial economics and agricultural development patterns.
+- name: domain_placement
+  value: 5.0
+  max_value: 5.0
+  rationale: The "Exchange" domain is perfectly appropriate since this differential
+    emerges from market mechanisms and the spatial dynamics of trade between agricultural
+    producers and urban consumers. The concept fundamentally concerns how exchange
+    relationships create economic advantages.
+- name: vsm_relevance
+  value: 3.0
+  max_value: 5.0
+  rationale: This entity has moderate VSM relevance, primarily mapping to S4 (intelligence/environmental
+    adaptation) as it represents how economic actors respond to spatial market information.
+    However, it's somewhat abstract as a price differential rather than an operational
+    system component.
+- name: explanatory_value
+  value: 5.0
+  max_value: 5.0
+  rationale: This entity provides excellent explanatory power by illuminating the
+    underlying economic mechanism that drives spatial patterns of agricultural development
+    and land values. It explains why cultivation intensifies near towns and how market
+    proximity creates systematic economic advantages beyond mere convenience.
+---
+
+# Evaluation: Agricultural Price Differential
+
+## definition_precision — 4.0 / 5.0
+
+The definition clearly identifies a specific economic mechanism - the price advantage from saved transportation costs for agricultural producers near towns. It avoids circularity and captures a distinct concept with measurable components (same price, reduced costs, resulting differential).
+
+## source_grounding — 5.0 / 5.0
+
+This concept is directly grounded in Smith's analysis in Book III, Chapter 1, where he explicitly discusses how proximity to markets affects agricultural profitability and land improvement incentives. The entity accurately reflects Smith's reasoning about spatial economics and agricultural development patterns.
+
+## domain_placement — 5.0 / 5.0
+
+The "Exchange" domain is perfectly appropriate since this differential emerges from market mechanisms and the spatial dynamics of trade between agricultural producers and urban consumers. The concept fundamentally concerns how exchange relationships create economic advantages.
+
+## vsm_relevance — 3.0 / 5.0
+
+This entity has moderate VSM relevance, primarily mapping to S4 (intelligence/environmental adaptation) as it represents how economic actors respond to spatial market information. However, it's somewhat abstract as a price differential rather than an operational system component.
+
+## explanatory_value — 5.0 / 5.0
+
+This entity provides excellent explanatory power by illuminating the underlying economic mechanism that drives spatial patterns of agricultural development and land values. It explains why cultivation intensifies near towns and how market proximity creates systematic economic advantages beyond mere convenience.