Adds the brand layer per D-189 §5:
- Schema: brand_products, brand_inputs, system_fiscal, corp_financial_state,
corp_lifecycle_events (+ 5 indexes).
- Importer: reads wiki/economics/corporations/brands.toml, populates the
new tables, validates V-B01–V-B05 structural rules, and derives
system_fiscal for inhabited systems.
- Data: 8 brand_products, 16 brand_inputs, 301 system_fiscal rows.
Brand products are demand nodes — they consume commodities; they are not
commodities themselves (D-185). Depends on copy PR #127 for the corp
records referenced by brands.toml.
jpmschweitzer
03e0d1c022