fix(model-server): modelix-admin role had no permissions

Author: slisson

model-server/src/main/kotlin/org/modelix/model/server/DBAccessControlPersistence.kt

@@ -12,7 +12,7 @@ class DBAccessControlPersistence<E>(val store: IGenericStoreClient<E>, val key:
     override fun read(): AccessControlData {
         @OptIn(RequiresTransaction::class)
         return store.runReadTransaction {
-            store.get(key)?.let { json.decodeFromString(it) } ?: AccessControlData()
+            (store.get(key)?.let { json.decodeFromString(it) } ?: AccessControlData()).withLegacyRoles()
         }
     }