Update

priv/repo/migrations/20250617091354_create_relations.exs

@@ -0,0 +1,23 @@
+defmodule Nulla.Repo.Migrations.CreateActorRelations do
+  use Ecto.Migration
+
+  def change do
+    create table(:relations, primary_key: false) do
+      add :id, :bigint, primary_key: true
+      add :source_id, :bigint, null: false
+      add :target_id, :bigint, null: false
+      add :type, :string, null: false
+      add :status, :string, null: false
+      add :activity_id, :bigint
+
+      timestamps()
+    end
+
+    create index(:relations, [:source_id])
+    create index(:relations, [:target_id])
+    create index(:relations, [:type])
+    create index(:relations, [:activity_id])
+
+    create unique_index(:relations, [:source_id, :target_id, :type])
+  end
+end