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/merchant_country_gentleman_transition.md

@@ -0,0 +1,31 @@
+---
+entity_slug: merchant_country_gentleman_transition
+entity_type: Process
+vsm_system: S4
+type_rationale: This represents a dynamic transformation with duration where merchants
+  actively transition from urban commerce to rural landownership, bringing new practices
+  and behaviors rather than being a static entity or structural rule.
+vsm_rationale: This process functions as environmental adaptation and intelligence
+  gathering, where merchants scan opportunities in rural estates and adapt commercial
+  practices to agricultural improvement, representing the economy's adaptive response
+  to new investment opportunities.
+classified_at: '2026-02-23T11:15:23.012386'
+---
+
+# Classification: Merchant Country Gentleman Transition
+
+## Entity Type
+
+Process
+
+## VSM System
+
+S4
+
+## Type Rationale
+
+This represents a dynamic transformation with duration where merchants actively transition from urban commerce to rural landownership, bringing new practices and behaviors rather than being a static entity or structural rule.
+
+## VSM Rationale
+
+This process functions as environmental adaptation and intelligence gathering, where merchants scan opportunities in rural estates and adapt commercial practices to agricultural improvement, representing the economy's adaptive response to new investment opportunities.