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/capital_employment_effects.md

@@ -0,0 +1,30 @@
+---
+entity_slug: capital_employment_effects
+entity_type: Relation
+vsm_system: S3
+type_rationale: Capital Employment Effects represents a structural dependency between
+  different methods of employing capital and their resulting economic outcomes in
+  terms of labour utilization and value creation.
+vsm_rationale: This entity operates within S3 Management as it concerns the systematic
+  analysis of how different capital allocation decisions produce varying economic
+  outcomes, which is fundamentally about resource allocation and operational control.
+classified_at: '2026-02-23T10:49:03.220466'
+---
+
+# Classification: Capital Employment Effects
+
+## Entity Type
+
+Relation
+
+## VSM System
+
+S3
+
+## Type Rationale
+
+Capital Employment Effects represents a structural dependency between different methods of employing capital and their resulting economic outcomes in terms of labour utilization and value creation.
+
+## VSM Rationale
+
+This entity operates within S3 Management as it concerns the systematic analysis of how different capital allocation decisions produce varying economic outcomes, which is fundamentally about resource allocation and operational control.