chore(meta): update changelog

Add the D-237 authored specialization layer (and D-233 re-amendment) under
[Unreleased].

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

CHANGELOG.md

@@ -7,6 +7,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- **Authored per-system specialization layer** (D-237, D-233 re-amended) — each inhabited system gains three authored, static, deterministic identity fields driving world generation: `economic_specialization` (27-value vocabulary with scale baked into the value, e.g. breadbasket vs estate_farm vs terroir), `cultural_specialization` (activity + founding-heritage vocabulary so e.g. a Vietnamese-founded system reads correctly instead of taking its corridor's default), and `dominant_faction` (who governs). Authored lore wins; unnamed systems fall back to a deterministic-but-varied seed-hashed draw so they don't all read identically
 - **Kanban + milestones workflow** (D-221) — replaces sprint-based workflow with dependency-driven batch selection, many-to-many milestones, `/whats-next` skill with Si refinement review, `/pr-process` skill (author-side review comment pickup), clerk pre-push hook for D-record consistency
 - **Atlas orbital redesign** — horizontal orrery layout with half-sun on left, globe textures loaded from wiki, radius-based body sizing (Earth = 24px reference, unclamped), partial orbital arcs
 - **Globe texture coverage** — 100% of 3240 bodies now have globe.png; generated oort cloud + asteroid belt generics via Gemini, donor-filled 40 missing bodies from same-class pool