* feat(update): add --append-notes flag (bd-b5qu)
Add --append-notes flag that appends to existing notes with a newline
separator instead of overwriting. This prevents data loss in workflows
where multiple steps need to add info to notes (e.g., tackle workflows).
- Errors if both --notes and --append-notes specified
- Handles both daemon and direct mode paths
- Combines existing notes + newline + new content
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* test(update): add tests for --append-notes flag
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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>