feat(sms): Transport recipient PhoneNumber + SmsConfig round-trip (S10)

src/ZB.MOM.WW.ScadaBridge.Transport/Import/ArtifactDiff.cs

@@ -210,7 +210,9 @@ public sealed class ArtifactDiff
             incoming.Recipients,
             e => e.Name,
             i => i.Name,
-            (e, i) => e.EmailAddress == i.EmailAddress,
+            // S10: a recipient is unchanged only when BOTH contacts match — a phone
+            // number added/changed on an existing recipient is a real diff.
+            (e, i) => e.EmailAddress == i.EmailAddress && e.PhoneNumber == i.PhoneNumber,
             "Recipients",
             changes);
 

src/ZB.MOM.WW.ScadaBridge.Transport/Import/BundleImporter.cs

@@ -2411,7 +2411,7 @@ public sealed class BundleImporter : IBundleImporter
                     existing.Recipients.Clear();
                     foreach (var r in dto.Recipients)
                     {
-                        existing.Recipients.Add(new NotificationRecipient(r.Name, r.EmailAddress));
+                        existing.Recipients.Add(BuildRecipient(r));
                     }
                     await _notificationRepo.UpdateNotificationListAsync(existing, ct).ConfigureAwait(false);
                     await _auditService.LogAsync(user, "Update", "NotificationList", existing.Id.ToString(), existing.Name,
@@ -2438,11 +2438,29 @@ public sealed class BundleImporter : IBundleImporter
         var list = new NotificationList(overrideName ?? dto.Name) { Type = dto.Type };
         foreach (var r in dto.Recipients)
         {
-            list.Recipients.Add(new NotificationRecipient(r.Name, r.EmailAddress));
+            list.Recipients.Add(BuildRecipient(r));
         }
         return list;
     }
 
+    // S10: reconstruct a recipient carrying whichever contact(s) the bundle holds.
+    // Email-only and SMS-only round-trip exactly; a recipient with both keeps both.
+    // Build via the email ctor when an address is present (so the historical
+    // non-null-email path is unchanged) and additively restore the phone number;
+    // otherwise fall back to the SMS factory for phone-only recipients.
+    private static NotificationRecipient BuildRecipient(NotificationRecipientDto r)
+    {
+        if (r.EmailAddress is not null)
+        {
+            return new NotificationRecipient(r.Name, r.EmailAddress)
+            {
+                PhoneNumber = r.PhoneNumber,
+            };
+        }
+
+        return NotificationRecipient.ForSms(r.Name, r.PhoneNumber ?? string.Empty);
+    }
+
     private async Task ApplySmtpConfigsAsync(
         IReadOnlyList<SmtpConfigDto> dtos,
         Dictionary<(string, string), ImportResolution> map,