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/progressive_wealth_consequentiality.md

@@ -0,0 +1,30 @@
+---
+entity_slug: progressive_wealth_consequentiality
+entity_type: Principle
+vsm_system: S4
+type_rationale: This represents an abstract theoretical law about how economic development
+  naturally unfolds when undisturbed by artificial interference, establishing an invariant
+  pattern that Smith claims holds across contexts.
+vsm_rationale: This principle operates as intelligence about how economic systems
+  naturally adapt and develop in response to their environment, describing the systemic
+  pattern by which towns and rural areas maintain balance without external intervention.
+classified_at: '2026-02-23T11:22:57.827857'
+---
+
+# Classification: Progressive Wealth Consequentiality
+
+## Entity Type
+
+Principle
+
+## VSM System
+
+S4
+
+## Type Rationale
+
+This represents an abstract theoretical law about how economic development naturally unfolds when undisturbed by artificial interference, establishing an invariant pattern that Smith claims holds across contexts.
+
+## VSM Rationale
+
+This principle operates as intelligence about how economic systems naturally adapt and develop in response to their environment, describing the systemic pattern by which towns and rural areas maintain balance without external intervention.