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/colonial_economic_autonomy_benefits.md

@@ -0,0 +1,30 @@
+---
+entity_slug: colonial_economic_autonomy_benefits
+entity_type: Principle
+vsm_system: S4
+type_rationale: The entity describes a general theoretical claim by Smith that greater
+  economic autonomy for colonies leads to specific advantages and promotes development,
+  functioning as an abstract law within his economic framework.
+vsm_rationale: The benefits arise from the colony's ability to adapt to its environment,
+  exploit local conditions, and develop according to its unique circumstances, which
+  are core functions of the intelligence and adaptation system (S4).
+classified_at: '2026-02-23T10:34:54.225725'
+---
+
+# Classification: Colonial Economic Autonomy Benefits
+
+## Entity Type
+
+Principle
+
+## VSM System
+
+S4
+
+## Type Rationale
+
+The entity describes a general theoretical claim by Smith that greater economic autonomy for colonies leads to specific advantages and promotes development, functioning as an abstract law within his economic framework.
+
+## VSM Rationale
+
+The benefits arise from the colony's ability to adapt to its environment, exploit local conditions, and develop according to its unique circumstances, which are core functions of the intelligence and adaptation system (S4).