- Merge stage-0-now.org content into stages/_index.org (now titled 'Stage 0: Now')
- Delete stage-0-now.org
- Add stage overview table to the top of the page (8 stages, what changes, threat eliminated)
- Update all cross-references from old stage-0 UUID to stages _index UUID
- Regenerate ID map to reflect the deletion
- Also fix page-list shortcode: .ByTitle -> .ByWeight so subpage listing matches sidebar order
- Rebuild: 147 files, 0 errors