infospace: process book-3-chapter-04

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/retainers-and-dependents-system.md

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+
+# Retainers and Dependents System
+
+## Definition
+
+The pre-commercial social structure where great landowners maintained large
+numbers of followers and dependents who received subsistence directly from the
+landowner's bounty, creating a system of obligation and power based on the
+landowner's ability to consume surplus agricultural produce locally.
+
+## Source Chapter
+
+Book III, Chapter 4
+
+## Context
+
+Smith describes this as the feudal system where landowners had nothing to
+exchange their surplus produce for, so they consumed it through maintaining
+retainers, creating a power structure based on direct subsistence provision
+rather than market exchange.
+
+## Economic Domain
+
+Distribution
+
+---