First pass at record sets

priv/repo/migrations/20260205113052_create_record_sets.exs

@@ -0,0 +1,13 @@
+defmodule MusicLibrary.Repo.Migrations.CreateRecordSets do
+  use Ecto.Migration
+
+  def change do
+    create table(:record_sets, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :name, :string, null: false
+      add :description, :text
+
+      timestamps(type: :utc_datetime)
+    end
+  end
+end

priv/repo/migrations/20260205113055_create_record_set_items.exs

@@ -0,0 +1,21 @@
+defmodule MusicLibrary.Repo.Migrations.CreateRecordSetItems do
+  use Ecto.Migration
+
+  def change do
+    create table(:record_set_items, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :position, :integer, null: false
+
+      add :record_set_id, references(:record_sets, type: :binary_id, on_delete: :delete_all),
+        null: false
+
+      add :record_id, references(:records, type: :binary_id, on_delete: :delete_all), null: false
+
+      timestamps(type: :utc_datetime)
+    end
+
+    create index(:record_set_items, [:record_set_id])
+    create unique_index(:record_set_items, [:record_set_id, :record_id])
+    create index(:record_set_items, [:record_set_id, :position])
+  end
+end