infospace: process book-4-chapter-04

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/processing-log.yaml

@@ -890,3 +890,44 @@
     finish_reason: stop
     duration_seconds: 102.9
     error: null
+- source_id: book-4-chapter-04
+  processed_at: '2026-02-19T20:36:17Z'
+  provider: openrouter
+  model: arcee-ai/trinity-large-preview:free
+  success: true
+  total_prompt_tokens: 27009
+  total_completion_tokens: 9715
+  total_cost: 0.0
+  total_duration_seconds: 270.8
+  total_retries: 0
+  stages:
+  - stage: extract-entities
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 9464
+    completion_tokens: 2988
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 88.1
+    error: null
+  - stage: map-to-vsm
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 5114
+    completion_tokens: 5084
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 112.8
+    error: null
+  - stage: synthesize-analysis
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 12431
+    completion_tokens: 1643
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 69.9
+    error: null