infospace: process book-4-introduction

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/economic-system-transformation.md

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+<!-- generated: provider=openrouter model=arcee-ai/trinity-large-preview:free date=2026-02-19 source=book-4-introduction -->
+
+# Economic System Transformation
+
+## Definition
+
+The fundamental change and restructuring of economic arrangements from one system to another, involving the replacement of existing institutions, policies, and practices with new ones that represent a different approach to organizing economic activity and achieving political economy's objectives.
+
+## Source Chapter
+
+Book IV, Chapter 0
+
+## Context
+
+Smith's distinction between ancient and modern systems implies the possibility and occurrence of fundamental transformations in economic arrangements as societies develop and circumstances change.
+
+## Economic Domain
+
+General Theory
+
+---