## Why
Meeting artifact notes currently emit frontmatter properties that can point back to the same note. Self-references add noise and make backlinks less useful.

## What Changes
- Meeting note frontmatter keeps links to transcript, assistant context, and summary.
- Transcript, assistant context, and summary notes keep links only to the other notes from the same run.
- The frontmatter property that would reference the note itself is omitted.

## Impact
- Shared artifact frontmatter rendering changes for transcript, assistant context, and summary notes.
- Existing resolver behavior based on meeting note links is unchanged.