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/economic_system_consequence.md

@@ -0,0 +1,30 @@
+---
+entity_slug: economic_system_consequence
+entity_type: Element
+vsm_system: S5
+type_rationale: Economic System Consequence represents the tangible outcomes and results
+  that persist as measurable effects of economic arrangements, making it a stock-like
+  entity that exists independently rather than a process or relation.
+vsm_rationale: These consequences serve as the ultimate measures by which political
+  economy systems are evaluated against their fundamental purposes and objectives,
+  placing them at the policy level where system identity and purpose are defined.
+classified_at: '2026-02-23T11:00:59.863013'
+---
+
+# Classification: Economic System Consequence
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S5
+
+## Type Rationale
+
+Economic System Consequence represents the tangible outcomes and results that persist as measurable effects of economic arrangements, making it a stock-like entity that exists independently rather than a process or relation.
+
+## VSM Rationale
+
+These consequences serve as the ultimate measures by which political economy systems are evaluated against their fundamental purposes and objectives, placing them at the policy level where system identity and purpose are defined.