chore(meta): update changelog

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

CHANGELOG.md

@@ -7,8 +7,19 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Changed
-- Merged maintenance branch — $REPO_ROOT env var in all instruction files, skill/agent config updates
-- Ticketing database updated with new backlog items and status changes
+- Ticketing database moved to shared worktree location (`../settledreach.db`) — eliminates binary merge conflicts across branches
+- All Python connectors use script-relative path resolution instead of `$REPO_ROOT` env var or git rev-parse
+- `$REPO_ROOT` environment variable removed — all scripts, skills, and docs use relative paths
+- Merged copy branch — 39 tickets, wiki review + content scoping workshops, game world glossary
+- Merged maintenance branch — worktree-update skill
+
+### Added
+- `make db-backup` / `make db-install` — database backup to `docs/backups/` (main-only) and restore for new clones
+- Worktree-update skill backs up the shared database after merges on main
+
+### Removed
+- `db/commonwealth.db` from git tracking (replaced by shared `../settledreach.db`)
+- `$REPO_ROOT` env var from all 9 worktree `settings.local.json` files
 
 ### Added
 - Worktree-update skill — non-destructive branch sync with PR detection and conflict safety