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/prodigals_and_projectors.md

@@ -0,0 +1,30 @@
+---
+entity_slug: prodigals_and_projectors
+entity_type: Element
+vsm_system: S3
+type_rationale: Prodigals and projectors are distinct categories of economic actors
+  who persist as identifiable agents in the economy, representing specific types of
+  borrowers with characteristic behaviors rather than processes or abstract principles.
+vsm_rationale: These actors operate within the management system where capital allocation
+  decisions are made, as they compete for borrowed capital and influence how financial
+  resources are distributed between productive and unproductive uses.
+classified_at: '2026-02-23T11:22:17.255500'
+---
+
+# Classification: Prodigals And Projectors
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S3
+
+## Type Rationale
+
+Prodigals and projectors are distinct categories of economic actors who persist as identifiable agents in the economy, representing specific types of borrowers with characteristic behaviors rather than processes or abstract principles.
+
+## VSM Rationale
+
+These actors operate within the management system where capital allocation decisions are made, as they compete for borrowed capital and influence how financial resources are distributed between productive and unproductive uses.