feat: start on AI integration

lib/bds/ai/catalog_meta.ex

@@ -0,0 +1,18 @@
+defmodule BDS.AI.CatalogMeta do
+  @moduledoc false
+
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  @primary_key {:key, :string, autogenerate: false}
+
+  schema "ai_catalog_meta" do
+    field :value, :string
+  end
+
+  def changeset(meta, attrs) do
+    meta
+    |> cast(attrs, [:key, :value], empty_values: [nil])
+    |> validate_required([:key, :value])
+  end
+end