[bug] Fix label management regression after API refactor

[hasjack]

Overview

Label management functionality appears to have regressed during the legacy API to GitHub API refactor.

Current Behavior

Attempting to add labels to issues results in errors, suggesting the label management endpoints are not working as expected.

Example error when adding labels:

Expected Behavior

• Should be able to add labels to issues
• Labels should persist
• Label operations should work consistently

Technical Investigation Needed

1. Review GitHub API integration for label endpoints
2. Check label schema mapping
3. Verify GraphQL mutations
4. Test label operations end-to-end

Impact

• Unable to properly categorize issues
• Agent attribution not working
• Reduced issue organization capabilities