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_society_emergence.md

@@ -0,0 +1,31 @@
+---
+entity_slug: commercial_society_emergence
+entity_type: Process
+vsm_system: S4
+type_rationale: Commercial Society Emergence is fundamentally a historical transformation
+  with duration that involves the gradual replacement of one economic system with
+  another, making it a process rather than a static entity or rule.
+vsm_rationale: This emergence represents the economic system's adaptive response to
+  environmental changes and opportunities, requiring intelligence gathering about
+  new market possibilities and institutional arrangements that enable the transition
+  from feudal to commercial organization.
+classified_at: '2026-02-23T10:55:34.740462'
+---
+
+# Classification: Commercial Society Emergence
+
+## Entity Type
+
+Process
+
+## VSM System
+
+S4
+
+## Type Rationale
+
+Commercial Society Emergence is fundamentally a historical transformation with duration that involves the gradual replacement of one economic system with another, making it a process rather than a static entity or rule.
+
+## VSM Rationale
+
+This emergence represents the economic system's adaptive response to environmental changes and opportunities, requiring intelligence gathering about new market possibilities and institutional arrangements that enable the transition from feudal to commercial organization.