- Move config loading to dedicated ConfigLoader class with validation
- Add DATABASE_MIGRATIONS.md content to TROUBLESHOOTING.md
- Add API_STATUS_CODES.md documenting all API response codes
- Update runner.csx to use new config structure
- Add check_responses.py validation script
- Update config tests for new structure
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
