fix(core) - I was exporting private interfaces. No need for that.

[raygoe]

Description

I was exporting private interfaces. No need for that.

Type of Change

• feat - New feature
• fix - Bug fix
• docs - Documentation update
• style - Code style changes (formatting)
• refactor - Code refactoring
• perf - Performance improvement
• test - Test additions/fixes
• build - Build system changes
• ci - CI configuration changes

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• All tests pass locally

Code Quality

• Code follows the C++ Manual
• No compiler warnings
• Breaking changes documented (if any)
• Documentation updated

AI Policy Compliance

• No AI-generated content
• Contains AI-generated code (disclosed and reviewed)

Checklist

• Branch is up-to-date with main
• Commit messages follow conventional format
• CI checks pass
• Self-review completed