Merge PR #819 from justbry with improvements:
- Add --format obsidian option to bd export
- Generate Obsidian Tasks-compatible markdown
- Default output to ai_docs/changes-log.md
- Map status to checkboxes, priority to emoji, type to tags
- Support parent-child hierarchy with indentation
- Use official Obsidian Tasks format (🆔, ⛔ emojis)
Improvement over PR: replaced O(n²) bubble sort with slices.SortFunc
for date ordering.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: justbry <justbu42@proton.me>
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
