The SQLite database now lives at ../settledreach.db, shared across all
git worktrees. This eliminates binary merge conflicts that occurred
whenever two branches modified the database independently.
All Python connectors (ticket CLI, sqlite_connector, decisions_sync)
now resolve the DB path relative to their own location — three levels
up from db/connectors/ reaches the worktree parent. The _main_worktree()
git-rev-parse pattern and config.json sqlite_db key are removed.
The database file is untracked from git; a backup mechanism commits
snapshots through the main branch (see following commits).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>