Revert of #1820 behavior. Each worktree now gets its own bucket:
- In a worktree, primary = `parent/worktree` (e.g. `claude-mem/dar-es-salaam`)
- In a main repo, primary = basename (unchanged)
- allProjects is always `[primary]` — strict isolation at query time
Includes a one-off maintenance script (scripts/worktree-remap.ts) that
retroactively reattributes past sessions to their worktree using path
signals in observations and user prompts. Two-rule inference keeps the
remap high-confidence:
1. The worktree basename in the path matches the session's current
plain project name (pre-#1820 era; trusted).
2. Or all worktree path signals converge on a single (parent, worktree)
across the session.
Ambiguous sessions are skipped.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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