Refactor Catalog update/upsert endpoints and service logic

- Update endpoint now returns CatalogReadDto or NotFound
- Replace UpdateWithStoredProcedure with Upsert endpoint (PUT /upsert)
- Rename AddAsync to InsertAsync; UpdateAsync returns DTO or null
- Introduce UpsertAsync for combined insert/update logic
- Remove stored procedure-specific update/delete methods
- Use DTOs consistently in controller/service responses
- Repository methods now return entities instead of booleans

DbFirst.Application/Catalogs/ICatalogService.cs

@@ -5,8 +5,7 @@ public interface ICatalogService
     Task<List<CatalogReadDto>> GetAllAsync(CancellationToken cancellationToken = default);
     Task<CatalogReadDto?> GetByIdAsync(int id, CancellationToken cancellationToken = default);
     Task<CatalogReadDto> CreateAsync(CatalogWriteDto dto, CancellationToken cancellationToken = default);
-    Task<bool> UpdateAsync(int id, CatalogWriteDto dto, CancellationToken cancellationToken = default);
-    Task<CatalogReadDto?> UpdateWithStoredProcedureAsync(int id, CatalogWriteDto dto, CancellationToken cancellationToken = default);
+    Task<CatalogReadDto?> UpdateAsync(int id, CatalogWriteDto dto, CancellationToken cancellationToken = default);
+    Task<CatalogReadDto?> UpsertAsync(CatalogWriteDto dto, CancellationToken cancellationToken = default);
     Task<bool> DeleteAsync(int id, CancellationToken cancellationToken = default);
-    Task<bool> DeleteWithStoredProcedureAsync(int id, CancellationToken cancellationToken = default);
 }