Adds non-blocking tracks dependency type for convoy to issue relationships: - Non-blocking: does not affect ready work calculation - Cross-prefix capable: convoys in hq-* can track issues in gt-*, bd-* - Reverse lookup: bd dep list <id> --direction=up -t tracks Also adds bd dep list command with direction and type filtering for querying dependencies/dependents. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>