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_potential.md

@@ -0,0 +1,31 @@
+---
+entity_slug: colonial_economic_potential
+entity_type: Element
+vsm_system: S4
+type_rationale: Colonial Economic Potential represents a measurable capacity or stock
+  of unrealized economic capability that exists as an inherent attribute of colonial
+  territories, making it a persistent entity rather than a process or abstract principle.
+vsm_rationale: This potential serves as intelligence about environmental opportunities
+  and adaptive possibilities that inform strategic decisions about trade policy and
+  colonial management, fitting S4's role in scanning the environment for developmental
+  opportunities.
+classified_at: '2026-02-23T10:50:59.649177'
+---
+
+# Classification: Colonial Economic Potential
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S4
+
+## Type Rationale
+
+Colonial Economic Potential represents a measurable capacity or stock of unrealized economic capability that exists as an inherent attribute of colonial territories, making it a persistent entity rather than a process or abstract principle.
+
+## VSM Rationale
+
+This potential serves as intelligence about environmental opportunities and adaptive possibilities that inform strategic decisions about trade policy and colonial management, fitting S4's role in scanning the environment for developmental opportunities.