chore(content): update brands.toml header — stale Phase 2 boundary comment

Header still said "4 anchor brands only, Phase 3 deferred". Now reflects
Sprint 36 #828 reality: 124 brand corps, full D-189 census, all 8 categories.

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

wiki/economics/corporations/brands.toml

@@ -7,12 +7,12 @@
 # tâtonnement simulation (D-185: brands consume commodities, not the reverse).
 # Pricing model and cultural premium curves are Phase 3+ deliverables (D-189).
 #
-# Phase 2 boundary: only the 4 anchor brands from D-189 §5 are authored here
-# (Calloway, VGV, thrds, Bífröst Marmor). The additional ~23 brand corps
-# listed in D-189 §11 are deliberately deferred to Phase 3 — Phase 2 only
-# needs the demand-node plumbing + V-B01..V-B06 validation to be exercised
-# end-to-end. Add new brands to this file; the importer and validators pick
-# them up without schema changes.
+# Sprint 36 #828: expanded from 4 anchor brands to full D-189 census —
+# 124 brand corps across all 8 categories (terroir, heritage_craft,
+# tech_premium, cultural, service_premium, commodity_branded,
+# design_heritage, platform_catalogue). V-B01..V-B06 validation passes.
+# Add new brands to this file; the importer and validators pick them up
+# without schema changes.
 #
 # Fields per [[brand_products]] entry:
 #   brand_product_id     Unique slug (corp_id + product slug)