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/bank_financial_stability.md

@@ -0,0 +1,30 @@
+---
+entity_slug: bank_financial_stability
+entity_type: Element
+vsm_system: S3
+type_rationale: Bank Financial Stability is a condition or state that banks maintain
+  through adequate capital, liquidity, and risk management - representing a persistent
+  quality or attribute that exists as a measurable characteristic of banking institutions.
+vsm_rationale: This entity operates within S3 as it concerns the management and operational
+  control of banking resources, specifically the allocation and management of capital
+  and liquidity that banks must maintain to ensure stable operations.
+classified_at: '2026-02-23T10:46:21.212308'
+---
+
+# Classification: Bank Financial Stability
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S3
+
+## Type Rationale
+
+Bank Financial Stability is a condition or state that banks maintain through adequate capital, liquidity, and risk management - representing a persistent quality or attribute that exists as a measurable characteristic of banking institutions.
+
+## VSM Rationale
+
+This entity operates within S3 as it concerns the management and operational control of banking resources, specifically the allocation and management of capital and liquidity that banks must maintain to ensure stable operations.