Fixes: 1) Correct `image_url` return logic in models; 2) Fix indentation in the `save` method of `payments` model; 3) Update a minor comment typo in `serializers.py`.
Extra: 1) Minor cleanup of unused imports in `initialize` command.
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.
