feat(example): add supply-chain-vsm composition demo (S3.5)

Demonstrates infospace composition: the Wealth of Nations infospace is
used as a discipline, applying Smith's economic framework as a lens to
analyse modern supply chain management concepts.

New example: examples/supply-chain-vsm/
- infospace.yaml binding WoN as discipline (../infospace-with-history)
- 3 source documents: coordination mechanisms, capital & inventory,
  market structure (~400 words each, original content)
- supply-chain-entity-schema-v1.0.md with WoN Concept required section
- won-mapping-schema-v1.0.md with Conceptual Continuity rating
- artifacts/won-reference/core-entities.md — 12 curated WoN entities
  for injection as discipline context
- 8 hand-crafted entity files demonstrating LLM output format
- 3 mapping files with full rationale and VSM inheritance chains
- Viable: YES (5/5 thresholds)

Key mappings demonstrated:
  Demand Signal          → Effectual Demand        (Strong, S2)
  Vendor-Managed Inventory → Division of Labour    (Strong, S1/S2)
  Just-in-Time Inventory → Circulating Capital     (Strong, S1/S3)
  Bullwhip Effect        → Natural Price           (Moderate, S2)
  Platform Intermediary  → Merchant Capital        (Strong, S2/S4)
  Monopsony Power        → Combination of Masters  (Strong, S3*)

Platform fix: entity_parser.py now recognises ## Supply Chain Domain
as a domain alias for ## Economic Domain, enabling composed infospaces
to use their own domain section name.

Tutorial §13 rewritten with real commands, real output, and the full
mapping table from the demo.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

examples/supply-chain-vsm/artifacts/sources/coordination-mechanisms.md

@@ -0,0 +1,63 @@
+# Coordination Mechanisms in Modern Supply Chains
+
+## Demand Signals and Information Flow
+
+Supply chains coordinate through the propagation of demand signals upstream
+from end consumers through retailers, distributors, and manufacturers to raw
+material suppliers. The quality and latency of these signals determine how
+well production is synchronised with actual consumption.
+
+In a well-functioning supply chain, a retailer's point-of-sale data becomes
+the input signal for a distributor's replenishment order, which in turn
+signals the manufacturer to schedule production runs. When this chain
+operates with full transparency and zero delay, production closely tracks
+consumption. When it operates with delays, batching, or information
+filtering, coordination failures emerge.
+
+## The Bullwhip Effect
+
+The bullwhip effect describes the amplification of demand variability as
+signals travel upstream in a supply chain. A 5% fluctuation in retail
+demand may translate into a 20% fluctuation in distributor orders and a
+40% swing in manufacturer production schedules. This amplification occurs
+because each node in the chain adds a safety buffer to its orders, reacts
+to the previous period's signal rather than real-time data, and places
+orders in discrete batches rather than continuously.
+
+The result is a supply chain that oscillates — periods of excess inventory
+alternating with periods of shortage — even when underlying consumer demand
+is relatively stable. The bullwhip effect is not a market equilibrium; it
+is a coordination failure in which the absence of shared real-time
+information causes each rational local decision to produce irrational
+aggregate outcomes.
+
+## Vendor-Managed Inventory
+
+Vendor-managed inventory (VMI) is a coordination arrangement in which the
+supplier, rather than the buyer, is responsible for maintaining stock levels
+at the buyer's location. The supplier has read access to the buyer's
+inventory data and automatically replenishes when stock falls below a
+specified threshold. Payment occurs when the buyer consumes the goods, not
+when they arrive.
+
+VMI represents a reallocation of the inventory management function: the
+buyer surrenders operational control over a specific task (replenishment)
+to the party better positioned to perform it (the supplier, who controls
+the supply side). This specialisation of function reduces transaction costs,
+improves forecast accuracy (the supplier sees real consumption, not
+batch orders), and smooths the demand signal upstream.
+
+## Supply Chain Visibility
+
+Supply chain visibility refers to the degree to which all participants can
+observe the state of inventory, orders, and shipments across the entire
+chain in real time. High visibility reduces the information asymmetries
+that drive the bullwhip effect and enables coordinated responses to
+disruption.
+
+Modern visibility platforms aggregate data from tracking systems, IoT
+sensors, and partner APIs to provide a unified operational picture. The
+commercial value of visibility comes from reducing the cost of safety
+stock (since uncertainty is lower) and enabling faster responses to supply
+shocks. Visibility is not merely a technical feature; it is a coordination
+mechanism that changes the incentive structure for every node in the chain.