feat: closing last gaps in backend functions we have available

lib/bds/cli_sync/notification.ex

@@ -0,0 +1,21 @@
+defmodule BDS.CliSync.Notification do
+  @moduledoc false
+
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "db_notifications" do
+    field :entity_type, :string
+    field :entity_id, :string
+    field :action, Ecto.Enum, values: [:created, :updated, :deleted]
+    field :from_cli, :boolean, default: true
+    field :seen_at, :integer
+    field :created_at, :integer
+  end
+
+  def changeset(notification, attrs) do
+    notification
+    |> cast(attrs, [:entity_type, :entity_id, :action, :from_cli, :seen_at, :created_at], empty_values: [nil])
+    |> validate_required([:entity_type, :entity_id, :action, :from_cli, :created_at])
+  end
+end