Add Repository Query Command

Repository Query and Command implementation details

• Add repository types in the TodoApp/Repositories folder.
• Keep read operations in TodoApp/Repositories/<Feature>Query.cs and write operations in TodoApp/Repositories/<Feature>Command.cs.
• Add methods to an existing repository pair when the data access belongs to the same feature; create a new query/command pair when introducing a new feature.
• Inject IDbContextFactory<TodoDbContext> into repository primary constructors.
• Create a fresh TodoDbContext inside each repository method with CreateDbContextAsync(cancellationToken).
• Use AsNoTracking() for query methods unless the method must intentionally return tracked entities from the same context.
• Keep filtering, ordering, includes, and projection in the query layer.
• Keep validation, request mapping, and multi-step orchestration in TodoApp/BusinessLogic/<Feature>Service.cs.
• Register each new repository in TodoApp/Program.cs with builder.Services.AddScoped<<Feature>Query>(); and .