feat(documents): enforce public visibility for image uploads

feat(documents): add debug logging for URL generation

feat(storage): add CDN URL support for public object access

fix(documents): update storage API router prefix

refactor: improve download URL generation logic for public and private images

feat(documents,storage): implement Cloudflare CDN integration for public image delivery

fix(documents): correct URL generation to use MinIO endpoint instead of hardcoded CDN

docs(documents): add unified upload implementation status and fix schema imports

feat(storage,catalogues,documents): implement unified bulk upload system with automatic URL handling

feat(catalogues,documents): implement permanent image URLs in catalogue collection

chore: add MinIO testing suite and configuration files

minio doc store