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_credit_quality.md

@@ -0,0 +1,30 @@
+---
+entity_slug: bank_credit_quality
+entity_type: Element
+vsm_system: S3*
+type_rationale: Bank Credit Quality is a measurable standard or characteristic that
+  exists as an attribute of banking operations, representing something that can be
+  assessed and maintained rather than a process or activity itself.
+vsm_rationale: Bank Credit Quality functions as an audit mechanism that ensures compliance
+  with sound lending standards and maintains the integrity of the banking system through
+  inspection of borrower quality and investment standards.
+classified_at: '2026-02-23T10:44:55.140960'
+---
+
+# Classification: Bank Credit Quality
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S3*
+
+## Type Rationale
+
+Bank Credit Quality is a measurable standard or characteristic that exists as an attribute of banking operations, representing something that can be assessed and maintained rather than a process or activity itself.
+
+## VSM Rationale
+
+Bank Credit Quality functions as an audit mechanism that ensures compliance with sound lending standards and maintains the integrity of the banking system through inspection of borrower quality and investment standards.