Fixes bd-85 (GH-1): bd dep tree was showing duplicate nodes when
multiple paths existed to the same issue (diamond dependencies).
Changes:
- Add path tracking in recursive CTE to detect cycles
- Add cycle prevention via path LIKE check
- Add Go-side deduplication using seen map
- Show each node only once at its shallowest depth
The fix maintains backward compatibility and passes all 37 tests.
Created follow-up issues:
- bd-164: Add visual indicators for multi-parent nodes
- bd-165: Add --show-all-paths flag
- bd-166: Make maxDepth configurable
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
431792b633