fix(iam-service): resolve 500 error on GET /api/v1/users endpoint

services/iam-service-net/src/IamService.API/Application/Queries/Users/GetUsersQueryHandler.cs

@@ -36,12 +36,12 @@ public class GetUsersQueryHandler : IRequestHandler<GetUsersQuery, GetUsersQuery
 
         var userViewModels = users.Select(u => new UserViewModel(
             u.Id,
-            u.Email!,
-            u.FirstName,
-            u.LastName,
-            u.FullName,
-            u.Status.Name,
-            u.CreatedAt,
+            u.Email ?? u.UserName ?? "",
+            u.FirstName ?? "",
+            u.LastName ?? "",
+            !string.IsNullOrEmpty(u.FirstName) ? u.FullName : (u.UserName ?? u.Email ?? ""),
+            u.Status?.Name ?? (u.LockoutEnd.HasValue && u.LockoutEnd > DateTimeOffset.UtcNow ? "Locked" : "Active"),
+            u.CreatedAt != default ? u.CreatedAt : DateTime.UtcNow,
             u.LastLoginAt));
 
         return new GetUsersQueryResult(

services/iam-service-net/src/IamService.Infrastructure/DependencyInjection.cs

@@ -70,6 +70,10 @@ public static class DependencyInjection
                         maxRetryDelay: TimeSpan.FromSeconds(10),
                         errorCodesToAdd: null);
                 });
+                // EN: Suppress PendingModelChangesWarning — backing field mappings don't change DB schema.
+                // VI: Suppress PendingModelChangesWarning — mapping backing fields không thay đổi DB schema.
+                options.ConfigureWarnings(w =>
+                    w.Ignore(Microsoft.EntityFrameworkCore.Diagnostics.RelationalEventId.PendingModelChangesWarning));
             });
         }
 

services/iam-service-net/src/IamService.Infrastructure/Repositories/UserRepository.cs

@@ -53,7 +53,7 @@ public class UserRepository : IUserRepository
         var totalCount = await query.CountAsync(cancellationToken);
 
         var users = await query
-            .OrderByDescending(u => u.CreatedAt)
+            .OrderByDescending(u => u.Id)
             .Skip((pageNumber - 1) * pageSize)
             .Take(pageSize)
             .ToListAsync(cancellationToken);