fix(application): carry env config group and comment across namespace migration

Namespace migration snapshots each environment's config items and replays them
into the target namespace via toUpdateCommands(). That mapping only copied key,
value, secret, and mountPath, so the UI-only group and comment metadata stored
in the oops.config-meta annotation was dropped on migration.

Copy group and comment onto each UpdateConfigMapCommand as well. Display order
was already preserved implicitly: getConfigMaps() returns items sorted by order
and updateConfigMap() re-derives order from list position, which the mapping
keeps intact.

Co-authored-by: Claude <noreply@anthropic.com>

Author: wellCh4n

src/main/java/com/github/wellch4n/oops/application/service/NamespaceMigrationService.java

@@ -193,13 +193,18 @@ private void redeployToTarget(Application application,
     }
 
     private List<UpdateConfigMapCommand> toUpdateCommands(List<ConfigMapItem> items) {
+        // The snapshot from getConfigMaps() is already sorted by display order, and updateConfigMap()
+        // re-derives each item's order from its position in this list, so preserving the iteration order
+        // here carries the manual ordering across the migration. Group and comment must be copied explicitly.
         List<UpdateConfigMapCommand> commands = new ArrayList<>();
         for (ConfigMapItem item : items) {
             UpdateConfigMapCommand command = new UpdateConfigMapCommand();
             command.setKey(item.getKey());
             command.setValue(item.getValue());
             command.setSecret(item.isSecret());
             command.setMountPath(item.getMountPath());
+            command.setGroup(item.getGroup());
+            command.setComment(item.getComment());
             commands.add(command);
         }
         return commands;