infospace: process book-4-introduction

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/economic-system-management.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 Management
+
+## Definition
+
+The administration and oversight of economic arrangements through policies, institutions, and practices that guide their operation and ensure they achieve their intended objectives, including the role of statesmen and legislators in managing economic systems.
+
+## Source Chapter
+
+Book IV, Chapter 0
+
+## Context
+
+Smith positions political economy as the science of the statesman or legislator, establishing the importance of management and oversight in economic arrangements and their effective operation.
+
+## Economic Domain
+
+Regulation
+
+---