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/melting_pot_effects.md

@@ -0,0 +1,30 @@
+---
+entity_slug: melting_pot_effects
+entity_type: Process
+vsm_system: S3*
+type_rationale: Melting Pot Effects describes an ongoing economic activity where coins
+  are systematically removed from circulation through melting, representing a flow
+  or transformation with duration rather than a static entity.
+vsm_rationale: This process fundamentally concerns the integrity and compliance of
+  the monetary system, as it undermines the mint's efforts to maintain adequate currency
+  circulation and requires government oversight to prevent currency degradation.
+classified_at: '2026-02-23T11:14:52.609016'
+---
+
+# Classification: Melting Pot Effects
+
+## Entity Type
+
+Process
+
+## VSM System
+
+S3*
+
+## Type Rationale
+
+Melting Pot Effects describes an ongoing economic activity where coins are systematically removed from circulation through melting, representing a flow or transformation with duration rather than a static entity.
+
+## VSM Rationale
+
+This process fundamentally concerns the integrity and compliance of the monetary system, as it undermines the mint's efforts to maintain adequate currency circulation and requires government oversight to prevent currency degradation.