Add 'Sync Branch Health' check that detects:
1. Local sync branch diverged from remote (after force-push reset)
2. Sync branch significantly behind main on source files (20+ commits, 50+ files)
Add --fix support that:
- Handles worktree case (resets within worktree)
- Handles regular branch case (deletes and recreates from main)
- Pushes the reset branch to remote
This helps contributors whose local beads-sync becomes orphaned after
someone else resets the branch.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
18191f5e54