Add more logging and trace parameters

src/Vegasco.Server.Api/Cars/UpdateCar.cs

@@ -10,6 +10,7 @@ namespace Vegasco.Server.Api.Cars;
 public static class UpdateCar
 {
 	public record Request(string Name);
+
 	public record Response(Guid Id, string Name);
 
 	public static RouteHandlerBuilder MapEndpoint(IEndpointRouteBuilder builder)
@@ -40,11 +41,22 @@ public static class UpdateCar
 		IEnumerable<IValidator<Request>> validators,
 		ApplicationDbContext dbContext,
 		UserAccessor userAccessor,
+		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		var logger = loggerFactory.CreateLogger(nameof(UpdateCar));
+
 		List<ValidationResult> failedValidations = await validators.ValidateAllAsync(request, cancellationToken);
 		if (failedValidations.Count > 0)
 		{
+			logger.LogDebug(
+				"Validation failed for request {@Request} with errors {@Errors}",
+				request,
+				failedValidations
+					.Where(x => !x.IsValid)
+					.SelectMany(x => x.Errors)
+					.Select(x => x.ErrorMessage));
+
 			return TypedResults.BadRequest(new HttpValidationProblemDetails(failedValidations.ToCombinedDictionary()));
 		}
 
@@ -60,13 +72,16 @@ public static class UpdateCar
 
 		if (isDuplicate)
 		{
+			logger.LogDebug("Car with name '{CarName}' (case insensitive) already exists", request.Name);
 			return TypedResults.Conflict();
 		}
 
 		car.Name = request.Name.Trim();
 		await dbContext.SaveChangesAsync(cancellationToken);
 
+		logger.LogTrace("Updated car: {@Car}", car);
+
 		Response response = new(car.Id.Value, car.Name);
 		return TypedResults.Ok(response);
 	}
-}
+}