Applied critical review feedback: - Fix double enumeration bug in GetBlueprintsForContentTypes - Add read lock to GetBlueprintsForContentTypes - Add empty array guard to DeleteBlueprintsOfTypes - Remove unused GetContentType method (dead code) - Make ArrayOfOneNullString verification explicit step 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>