chore(meta): update changelog

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

CHANGELOG.md

@@ -7,6 +7,9 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- Diegetic time display on insert HUD — station local time (HH:MM), day phase with cycle-tinted color, day number on InsertOverlay (#263)
+- Relationship color accent on E-Talk overlay — 3px left-edge bar using D-033 palette signals NPC relationship at a glance (#537)
+- `Constants.format_game_time()` helper for converting game-minutes to HH:MM station time
 - `/sprint-status` cleanup sweep skill — consistent health report with tickets by status, PR cross-reference, bookkeeping issue detection, and open work by team
 - `sprint sweep` CLI subcommand — structured JSON output for sprint health checks (grouped tickets, per-team summary, issue detection)
 - Knowledge Flow & NPC Boundaries workshop — 5 D-records (D-079–D-083) covering grant architecture, NPC-to-NPC propagation, unprompted disclosure, NPC information boundaries MVP, contradiction detection pipeline