feat(example): add L2 classifications for 823/988 WoN entities (S3.4)

Batch classification via OpenRouter (claude-sonnet-4). 165 entities
remain unclassified due to credit exhaustion; incremental skip means
a follow-up run will complete them automatically.

Type × VSM matrix (823 entities):
                  S1   S2   S3  S3*   S4   S5
  Element         86   75   58   21   43   32  (315 total, 38%)
  Process         39   42   37   17   67   24  (226 total, 28%)
  Institution      4   12   30   24    .   52  (122 total, 15%)
  Principle        3    7   15    2   43   32  (102 total, 12%)
  Relation         2   14    5    5   22   10   (58 total,  7%)
  Matrix fill: 29/30 cells (Institution/S4 empty — expected)

Metrics updated: type_entropy=2.0936, vsm_type_matrix_cells=29

Also:
- BatchEvaluator gains delay_seconds param for rate-limited providers
- classify CLI gains --rpm option (--rpm 10 for Gemini free tier)
- history.write_metrics_file now handles non-float metric values
  (type_distribution is a dict, was crashing round())
- run_entity_classification forwards delay_seconds to BatchEvaluator
- classify-links and graph commands added by user (entities --by-type,
  graph --format mermaid/dot, classify-links for Relation enrichment)

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

examples/infospace-with-history/output/classifications/commercial_jealousy_mechanism.md

@@ -0,0 +1,30 @@
+---
+entity_slug: commercial_jealousy_mechanism
+entity_type: Relation
+vsm_system: S4
+type_rationale: Commercial Jealousy Mechanism represents a structural causal link
+  between mercantilist beliefs and trade restriction behaviors, functioning as a connector
+  that explains how national rivalry drives specific economic policies.
+vsm_rationale: This mechanism operates primarily in the intelligence function by scanning
+  the competitive environment and adapting trade policies based on perceived threats
+  from rival nations, which aligns with S4's role in environmental analysis and adaptation.
+classified_at: '2026-02-23T10:55:27.032371'
+---
+
+# Classification: Commercial Jealousy Mechanism
+
+## Entity Type
+
+Relation
+
+## VSM System
+
+S4
+
+## Type Rationale
+
+Commercial Jealousy Mechanism represents a structural causal link between mercantilist beliefs and trade restriction behaviors, functioning as a connector that explains how national rivalry drives specific economic policies.
+
+## VSM Rationale
+
+This mechanism operates primarily in the intelligence function by scanning the competitive environment and adapting trade policies based on perceived threats from rival nations, which aligns with S4's role in environmental analysis and adaptation.