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/expense_of_defence.md

@@ -0,0 +1,31 @@
+---
+entity_slug: expense_of_defence
+entity_type: Element
+vsm_system: S5
+type_rationale: The Expense of Defence represents a persistent financial obligation
+  and cost structure that exists as a standing requirement of the sovereign, rather
+  than being a process, relationship, or abstract principle.
+vsm_rationale: As one of the sovereign's three primary duties that defines the fundamental
+  purpose and identity of government in protecting society from external threats,
+  the Expense of Defence operates at the policy level where ultimate authority and
+  societal purpose are determined.
+classified_at: '2026-02-23T11:05:19.221790'
+---
+
+# Classification: Expense Of Defence
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S5
+
+## Type Rationale
+
+The Expense of Defence represents a persistent financial obligation and cost structure that exists as a standing requirement of the sovereign, rather than being a process, relationship, or abstract principle.
+
+## VSM Rationale
+
+As one of the sovereign's three primary duties that defines the fundamental purpose and identity of government in protecting society from external threats, the Expense of Defence operates at the policy level where ultimate authority and societal purpose are determined.