Expand generation harness observability

backend/app/services/harness/plans.py

@@ -69,6 +69,11 @@ def build_story_plan(*, generate_images: bool) -> WorkflowPlan:
             step=WorkflowStep.NARRATIVE_GENERATION,
             artifact=ArtifactKind.STORY_TEXT,
         ),
+        WorkflowTask(
+            key="evaluate_narrative",
+            step=WorkflowStep.EVALUATION,
+            artifact=ArtifactKind.STORY_TEXT,
+        ),
         WorkflowTask(
             key="persist_story",
             step=WorkflowStep.STORY_PERSISTENCE,
@@ -124,6 +129,11 @@ def build_storybook_plan(*, generate_images: bool) -> WorkflowPlan:
             step=WorkflowStep.NARRATIVE_GENERATION,
             artifact=ArtifactKind.STORYBOOK_PAGES,
         ),
+        WorkflowTask(
+            key="evaluate_storybook_pages",
+            step=WorkflowStep.EVALUATION,
+            artifact=ArtifactKind.STORYBOOK_PAGES,
+        ),
     ]
 
     if generate_images: