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/national_animosity_in_commerce.md

@@ -0,0 +1,30 @@
+---
+entity_slug: national_animosity_in_commerce
+entity_type: Element
+vsm_system: S5
+type_rationale: National animosity in commerce is a persistent psychological and political
+  phenomenon that exists as a standing attitude or sentiment between nations, rather
+  than being a process, relationship, or principle.
+vsm_rationale: This hostile mindset operates at the highest level of political identity
+  and purpose, shaping fundamental policy decisions about how nations should relate
+  to each other economically and what the ultimate goals of trade policy should be.
+classified_at: '2026-02-23T11:17:20.101238'
+---
+
+# Classification: National Animosity In Commerce
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S5
+
+## Type Rationale
+
+National animosity in commerce is a persistent psychological and political phenomenon that exists as a standing attitude or sentiment between nations, rather than being a process, relationship, or principle.
+
+## VSM Rationale
+
+This hostile mindset operates at the highest level of political identity and purpose, shaping fundamental policy decisions about how nations should relate to each other economically and what the ultimate goals of trade policy should be.