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_spatial_organisation.md

@@ -0,0 +1,30 @@
+---
+entity_slug: economic_spatial_organisation
+entity_type: Principle
+vsm_system: S4
+type_rationale: Economic spatial organisation represents an abstract law describing
+  how economic activities systematically distribute across geographical space according
+  to consistent patterns based on market access and transportation costs.
+vsm_rationale: This principle operates as part of the intelligence system by revealing
+  how economic systems adapt to their geographical environment through spatial patterns
+  that emerge from scanning and responding to locational advantages and constraints.
+classified_at: '2026-02-23T11:00:07.166943'
+---
+
+# Classification: Economic Spatial Organisation
+
+## Entity Type
+
+Principle
+
+## VSM System
+
+S4
+
+## Type Rationale
+
+Economic spatial organisation represents an abstract law describing how economic activities systematically distribute across geographical space according to consistent patterns based on market access and transportation costs.
+
+## VSM Rationale
+
+This principle operates as part of the intelligence system by revealing how economic systems adapt to their geographical environment through spatial patterns that emerge from scanning and responding to locational advantages and constraints.