wip activities_published index

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

priv/repo/migrations/20230809231846_add_published_index_to_activities.exs

@@ -0,0 +1,12 @@
+defmodule Pleroma.Repo.Migrations.AddPublishedIndexToActivities do
+  use Ecto.Migration
+
+  def change do
+    create_if_not_exists(
+      index(:activities, ["case when data->>'type' = 'Create' then (data->'object'->>'published')::timestamptz else inserted_at end"],
+        name: :activities_published,
+        concurrently: true
+      )
+    )
+  end
+end