Fixes: 1) Ensure fallback to empty string when `image` is None in `Category` and `ProductImage`.
Extra: Refactored `resolve_image` methods for improved URL handling.
Fixes: 1) Add missing import for `settings` in multiple modules;
Extra: 1) Remove unused `SerializerMethodField` from serializers; 2) Update `RELEASE_DATE` to align with new version; 3) General cleanup and consistency adjustments.
Fixes: None;
Extra: 1) Simplify serializer methods by removing redundant `suppress` blocks for `image.url`; 2) Minor adjustments to GraphQL resolver parameter names for consistency.