[PM-28260] Optimize bulk reinvite endpoint (#6670)

* Implement optimized bulk invite resend command

- Added IBulkResendOrganizationInvitesCommand interface to define the bulk resend operation.
- Created BulkResendOrganizationInvitesCommand class to handle the logic for resending invites to multiple organization users.
- Integrated logging and validation to ensure only valid users receive invites.
- Included error handling for non-existent organizations and invalid user statuses.

* Add unit tests for BulkResendOrganizationInvitesCommand

- Implemented comprehensive test cases for the BulkResendOrganizationInvitesCommand class.
- Validated user statuses and ensured correct handling of valid and invalid users during bulk invite resends.
- Included tests for scenarios such as organization not found and empty user lists.
- Utilized Xunit and NSubstitute for effective testing and mocking of dependencies.

* Add IBulkResendOrganizationInvitesCommand to service collection

- Registered IBulkResendOrganizationInvitesCommand in the service collection for dependency injection.

* Update OrganizationUsersController to utilize IBulkResendOrganizationInvitesCommand

- Added IBulkResendOrganizationInvitesCommand to the OrganizationUsersController for handling bulk invite resends based on feature flag.
- Updated BulkReinvite method to conditionally use the new command or the legacy service based on the feature flag status.
- Enhanced unit tests to verify correct command usage depending on feature flag state, ensuring robust testing for both scenarios.

src/Api/AdminConsole/Controllers/OrganizationUsersController.cs

@@ -71,6 +71,7 @@ public class OrganizationUsersController : BaseAdminConsoleController
     private readonly IFeatureService _featureService;
     private readonly IPricingClient _pricingClient;
     private readonly IResendOrganizationInviteCommand _resendOrganizationInviteCommand;
+    private readonly IBulkResendOrganizationInvitesCommand _bulkResendOrganizationInvitesCommand;
     private readonly IAutomaticallyConfirmOrganizationUserCommand _automaticallyConfirmOrganizationUserCommand;
     private readonly IConfirmOrganizationUserCommand _confirmOrganizationUserCommand;
     private readonly IRestoreOrganizationUserCommand _restoreOrganizationUserCommand;
@@ -105,6 +106,7 @@ public class OrganizationUsersController : BaseAdminConsoleController
         IInitPendingOrganizationCommand initPendingOrganizationCommand,
         IRevokeOrganizationUserCommand revokeOrganizationUserCommand,
         IResendOrganizationInviteCommand resendOrganizationInviteCommand,
+        IBulkResendOrganizationInvitesCommand bulkResendOrganizationInvitesCommand,
         IAdminRecoverAccountCommand adminRecoverAccountCommand,
         IAutomaticallyConfirmOrganizationUserCommand automaticallyConfirmOrganizationUserCommand)
     {
@@ -131,6 +133,7 @@ public class OrganizationUsersController : BaseAdminConsoleController
         _featureService = featureService;
         _pricingClient = pricingClient;
         _resendOrganizationInviteCommand = resendOrganizationInviteCommand;
+        _bulkResendOrganizationInvitesCommand = bulkResendOrganizationInvitesCommand;
         _automaticallyConfirmOrganizationUserCommand = automaticallyConfirmOrganizationUserCommand;
         _confirmOrganizationUserCommand = confirmOrganizationUserCommand;
         _restoreOrganizationUserCommand = restoreOrganizationUserCommand;
@@ -273,7 +276,17 @@ public class OrganizationUsersController : BaseAdminConsoleController
     public async Task<ListResponseModel<OrganizationUserBulkResponseModel>> BulkReinvite(Guid orgId, [FromBody] OrganizationUserBulkRequestModel model)
     {
         var userId = _userService.GetProperUserId(User);
-        var result = await _organizationService.ResendInvitesAsync(orgId, userId.Value, model.Ids);
+
+        IEnumerable<Tuple<Core.Entities.OrganizationUser, string>> result;
+        if (_featureService.IsEnabled(FeatureFlagKeys.IncreaseBulkReinviteLimitForCloud))
+        {
+            result = await _bulkResendOrganizationInvitesCommand.BulkResendInvitesAsync(orgId, userId.Value, model.Ids);
+        }
+        else
+        {
+            result = await _organizationService.ResendInvitesAsync(orgId, userId.Value, model.Ids);
+        }
+
         return new ListResponseModel<OrganizationUserBulkResponseModel>(
             result.Select(t => new OrganizationUserBulkResponseModel(t.Item1.Id, t.Item2)));
     }