infospace: process book-2-chapter-04

Extract entities, map to VSM, and synthesize analysis.

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

@@ -480,3 +480,44 @@
     finish_reason: stop
     duration_seconds: 109.6
     error: null
+- source_id: book-2-chapter-04
+  processed_at: '2026-02-19T18:57:59Z'
+  provider: openrouter
+  model: arcee-ai/trinity-large-preview:free
+  success: true
+  total_prompt_tokens: 28757
+  total_completion_tokens: 10159
+  total_cost: 0.0
+  total_duration_seconds: 420.6
+  total_retries: 0
+  stages:
+  - stage: extract-entities
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 9443
+    completion_tokens: 2280
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 111.7
+    error: null
+  - stage: map-to-vsm
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 4407
+    completion_tokens: 6404
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 223.5
+    error: null
+  - stage: synthesize-analysis
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 14907
+    completion_tokens: 1475
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 85.4
+    error: null