chore(): small improvements

src/backend/api/v1/experiments/endpoints.py

@@ -184,12 +184,14 @@ def create_variant(
     experiment_id: UUID,
     payload: VariantCreateIn,
 ) -> tuple[HTTPStatus, VariantOut]:
+    user = _get_user(request)
     exp = get_object_or_404(
-        Experiment.objects.select_related("flag"),
+        Experiment.objects.select_related("flag", "owner"),
         pk=experiment_id,
     )
     v = variant_create(
         experiment=exp,
+        user=user,
         name=payload.name,
         value=payload.value,
         weight=payload.weight,
@@ -210,13 +212,15 @@ def update_variant(
     variant_id: UUID,
     payload: VariantUpdateIn,
 ) -> tuple[HTTPStatus, VariantOut]:
+    user = _get_user(request)
     v = get_object_or_404(
-        Variant.objects.select_related("experiment__flag"),
+        Variant.objects.select_related("experiment__flag", "experiment__owner"),
         pk=variant_id,
         experiment_id=experiment_id,
     )
     v = variant_update(
         variant=v,
+        user=user,
         **payload.model_dump(exclude_none=True),
     )
     return HTTPStatus.OK, VariantOut.model_validate(v)
@@ -233,12 +237,13 @@ def delete_variant(
     experiment_id: UUID,
     variant_id: UUID,
 ) -> tuple[HTTPStatus, None]:
+    user = _get_user(request)
     v = get_object_or_404(
-        Variant,
+        Variant.objects.select_related("experiment__owner"),
         pk=variant_id,
         experiment_id=experiment_id,
     )
-    variant_delete(variant=v)
+    variant_delete(variant=v, user=user)
     return HTTPStatus.NO_CONTENT, None