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/progressive_state_of_society.md

@@ -0,0 +1,31 @@
+---
+entity_slug: progressive_state_of_society
+entity_type: Element
+vsm_system: S5
+type_rationale: The Progressive State of Society is a persistent condition or state
+  that a society can be in, making it a noun-like entity that exists independently
+  rather than a process, relation, or principle.
+vsm_rationale: As a societal condition that represents the optimal state for overall
+  prosperity and the "happiest and most comfortable state" for all orders of society,
+  it operates at the highest level of systemic identity and purpose that defines what
+  political economy should ultimately achieve.
+classified_at: '2026-02-23T11:22:54.461481'
+---
+
+# Classification: Progressive State Of Society
+
+## Entity Type
+
+Element
+
+## VSM System
+
+S5
+
+## Type Rationale
+
+The Progressive State of Society is a persistent condition or state that a society can be in, making it a noun-like entity that exists independently rather than a process, relation, or principle.
+
+## VSM Rationale
+
+As a societal condition that represents the optimal state for overall prosperity and the "happiest and most comfortable state" for all orders of society, it operates at the highest level of systemic identity and purpose that defines what political economy should ultimately achieve.