Refactored UpdateEmailTemplateCommand and its handler to inherit from generic UpdateCommand and UpdateCommandHandler base classes. Replaced QueryExpression with BuildQueryExpression(), removed redundant Update property, and cleaned up unused usings. This improves code reuse, modularity, and consistency across update commands.
- Introduce EmailTemplateUpdateDto for update payloads.
- Expose Id and Type directly on UpdateEmailTemplateCommand; remove EmailTemplateQuery property.
- Add QueryExpression for flexible template selection by Id or Type.
- Remove AutoMapper and EmailTemplateDto usage from handler; update repository call to use EmailTemplateUpdateDto.
- Update MappingProfile to map EmailTemplateUpdateDto to EmailTemplate and set ChangedWhen to DateTime.UtcNow.
- Remove obsolete code and improve documentation.
Replaced EmailTemplateQueryBase record with IEmailTemplateQuery interface for email template queries. Updated all relevant commands, queries, and controller methods to use the new interface. Removed EmailTemplateQueryBase and migrated properties to implementing classes. Improved documentation to clarify query structure and Type property usage.
Replaced specific Update command import with general Commands namespace import to streamline access to all command classes. No functional changes made.
