Remove repository tests, usages of registration dto used in repo

web/backend/Features/Features.Auth/Commands/Login/LoginCommand.cs

@@ -0,0 +1,10 @@
+using Features.Auth.Dtos;
+using MediatR;
+
+namespace Features.Auth.Commands.Login;
+
+/// <summary>
+///     Authenticates a user using their username and password and issues new tokens. Bound directly
+///     from the request body of <c>POST /api/auth/login</c>.
+/// </summary>
+public record LoginCommand(string Username, string Password) : IRequest<LoginPayload>;