WIP notification settings

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

priv/repo/migrations/20210526203337_add_user_activity_settings.exs

@@ -0,0 +1,15 @@
+defmodule Mobilizon.Storage.Repo.Migrations.AddUserActivitySettings do
+  use Ecto.Migration
+
+  def change do
+    create table(:user_activity_settings) do
+      add(:key, :string, nulla: false)
+      add(:method, :string, null: false)
+      add(:enabled, :boolean, null: false)
+
+      add(:user_id, references(:users, on_delete: :delete_all), null: false)
+    end
+
+    create(unique_index(:user_activity_settings, [:user_id, :key, :method]))
+  end
+end