actually include service settings

Author: Max Hniebergall

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/elastic/ElasticInferenceService.java

@@ -304,6 +304,7 @@ public Model parsePersistedConfig(String inferenceEntityId, TaskType taskType, M
 
         if (DEFAULT_EIS_COMPLETION_ENDPOINT_ID.equals(inferenceEntityId)) {
             var defaultServiceSettings = new HashMap<String, Object>(1);
+            defaultServiceSettings.put(MODEL_ID, "elastic-model"); // TODO
             var serviceSettings = ElasticInferenceServiceCompletionServiceSettings.fromMap(
                 defaultServiceSettings,
                 ConfigurationParseContext.PERSISTENT