chore(meta): update changelog

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -23,6 +23,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - **Deterministic generation cascade** (#952, D-224/D-200) — `SeedChain`, a single splitmix64-based seed-derivation contract descending from the master world seed with domain separation (replaces ad-hoc seed mixing); an extensible per-layer cascade harness (`run_cascade`); and a golden-seed regression test pinning Layer 0→1 output (source heightmap SHA-256 + serialized topography) so any determinism drift is caught
 
 ### Changed
+- **Founding-heritage pass — every divergent-heritage system now reads true** (#1016) — authored a `cultural_specialization` for ~140 more systems (32 → 171), so a Vietnamese-, Igbo-, Finnish-, Korean-, Shona-, or Persian-founded system reads as itself instead of defaulting to its corridor's dominant culture. The heritage vocabulary is now a canonical 47-people taxonomy spanning the British Isles, Iberia/Latin America, Europe, sub-Saharan Africa, South/East/SE Asia, the Pacific, and the Middle East/Central Asia. Pinned only where a system's founders diverge from their corridor baseline; corridor-typical systems keep the regional default
 - **Heritage rebalance — five systems renamed** (#1019) — the corridor over-represented southern-African heritage, so five genuinely-thin afrikaans systems are refounded with new cultures: Droëland→**Marib** and Stilwater→**Sawad** (Arab), Koeberg→**Akhgar** and Carnarvon→**Golestan** (Persian), Skuilplek→**Sığınak** (Turkic). Their worlds, stations, drifter-guide entries, and the corporations named after them are renamed to match; the distinctive mysteries each system carries are preserved. Load-bearing systems (Eerste Wacht, Helderoog, Brandpunt, …) are untouched
 - `teammateMode` set to `auto` — teammates spawn in tmux split panes when the lead runs inside tmux, with graceful in-process fallback
 - **Planet simulation native resolution → 1024×512** (#963) — finer base terrain for the lower cascade layers (deterministic; same continents, more detail). Rivers are now computed by the cascade's drainage rather than painted by the sim, so they actually reach the sea