infospace: process book-3-chapter-04

Extract entities, map to VSM, and synthesize analysis.

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

@@ -685,3 +685,44 @@
     finish_reason: stop
     duration_seconds: 77.3
     error: null
+- source_id: book-3-chapter-04
+  processed_at: '2026-02-19T19:46:20Z'
+  provider: openrouter
+  model: arcee-ai/trinity-large-preview:free
+  success: true
+  total_prompt_tokens: 33491
+  total_completion_tokens: 7984
+  total_cost: 0.0
+  total_duration_seconds: 339.8
+  total_retries: 0
+  stages:
+  - stage: extract-entities
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 15938
+    completion_tokens: 2302
+    cost: 0.0
+    finish_reason: unknown
+    duration_seconds: 69.2
+    error: null
+  - stage: map-to-vsm
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 3561
+    completion_tokens: 4116
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 193.3
+    error: null
+  - stage: synthesize-analysis
+    retries: 0
+    provider: openrouter
+    model: arcee-ai/trinity-large-preview:free
+    prompt_tokens: 13992
+    completion_tokens: 1566
+    cost: 0.0
+    finish_reason: stop
+    duration_seconds: 77.3
+    error: null