fix(content): PR #133 review — 9 remaining items resolved

Closes 9 of 10 review items (blocker 1 handled in add2507e + d78d3b59):

- decisions/economics.md: reformat D-189 §5 amendment to standard
  Amendment (YYYY-MM-DD) block pattern (review #4)
- tooling/planet-gen/sol_name_fixes.py: dedup guard + argparse
  --dry-run (reviews #5, #10a)
- tooling/planet-gen/sol_markers/earth_features.json: trim to 11
  cities with selection rationale (review #6A); user-approved
  rebalance Sydney → Lagos and London → Brussels (review #6B)
- wiki/star-systems/GJ-380/bodies/GJ380c/markers.json: 2 secondary
  features renamed to Akan/Asante register — Kesset → Nkwanta Beck,
  Holt Spur → Bosomtwe Spur (review #7)
- docs/atlas/hand-refine-log.md: Aethelred lore-migration
  documentation + see-also cross-link to refine_log_849.md
  (reviews #8, #13)
- tooling/planet-gen/refine_log_849.md: rebalance addendum
- wiki/star-systems/GJ-0/bodies/GJ0d/markers.json, server/data/
  systems.db: re-synced after rebalance

Stub depth (review blocker #2) handled via split — tracked as
follow-up ticket #861 (three-layer narrative authoring).

Final Earth cities (11): Beijing, Brussels, Cairo, Delhi, Istanbul,
Lagos, Moscow, New York, São Paulo, Singapore, Tokyo.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

decisions/economics.md

@@ -337,7 +337,8 @@ This domain covers: currency system, commodity taxonomy, shadow economy, corpora
 
   **5. DB Schema**
   - `brand_products`: `brand_product_id`, `corp_id`, `product_name`, `brand_category` (8 values), `value_trajectory`, `scarcity_class` (`capped` / `constrained` / `scalable` / `unlimited`), `product_subcategory`, `base_premium_multiplier`, `premium_floor`, `origin_system`, `terroir_locked`, `currency_denomination`, `shadow_viable`, `brand_tier` (`halo` / `volume`), `halo_brand_id` (for volume tiers), `price_tier` (enum — see below)
-  - `price_tier` enum (5 values — amended Sprint 36 per team decision; closed enum locked on sprint-36/copy branch): `mass` (widely accessible, lowest price point; commodity_branded volume tiers) / `premium` (above-average quality signal; most volume tiers across categories) / `luxury` (aspirational, restricted availability; terroir and design_heritage halos) / `flagship` (pinnacle output, ultra-scarce; Veblen curve inflection; max 1 per brand, lore-grounded scarcity ceiling required) / `institutional` (B2B contract pricing, not market price; service_premium and platform_catalogue)
+  - `price_tier` enum (5 values): `mass` (widely accessible, lowest price point; commodity_branded volume tiers) / `premium` (above-average quality signal; most volume tiers across categories) / `luxury` (aspirational, restricted availability; terroir and design_heritage halos) / `flagship` (pinnacle output, ultra-scarce; Veblen curve inflection; max 1 per brand, lore-grounded scarcity ceiling required) / `institutional` (B2B contract pricing, not market price; service_premium and platform_catalogue)
+  - **Amendment (2026-04-19):** `price_tier` valid values were not defined in the original decision. Locked to the five values above per team decision, Sprint 36.
   - `brand_inputs`: `brand_product_id`, `commodity_id`, `quantity`
   - `system_fiscal`: `system_id`, `corp_tax_rate`, `collection_efficiency` (derived from `shadow_economy_intensity`)
   - `corp_financial_state` + `corp_lifecycle_events` tables for acquisition/startup lifecycle