feat: use default pipeline in project settings first

Author: mihow

ami/ml/orchestration/pipelines.py

@@ -13,11 +13,12 @@ def get_default_pipeline(project: Project) -> Pipeline | None:
 
     @TODO use project settings to determine the default pipeline
     """
-    return (
+    default_pipeline = project.default_processing_pipeline or (
         Pipeline.objects.all()
         .enabled(project=project)  # type: ignore
         .online(project=project)  # type: ignore
         .annotate(num_categories=models.Count("algorithms__category_map__labels"))
         .order_by("-num_categories", "-created_at")
         .first()
     )
+    return default_pipeline