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_system_stability.md

@@ -0,0 +1,30 @@
+---
+entity_slug: bank_financial_system_stability
+entity_type: Element
+vsm_system: S3
+type_rationale: Bank Financial System Stability is a condition or state that persists
+  over time as a measurable attribute of the financial system, making it a stock-like
+  element rather than a process or rule.
+vsm_rationale: This stability condition is fundamentally about the management and
+  operational control of financial resources and institutions, which is the core function
+  of S3 in ensuring effective resource allocation and system control.
+classified_at: '2026-02-23T10:46:27.700161'
+---
+
+# Classification: Bank Financial System Stability
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S3
+
+## Type Rationale
+
+Bank Financial System Stability is a condition or state that persists over time as a measurable attribute of the financial system, making it a stock-like element rather than a process or rule.
+
+## VSM Rationale
+
+This stability condition is fundamentally about the management and operational control of financial resources and institutions, which is the core function of S3 in ensuring effective resource allocation and system control.