feat: add persistence for task

flake.nix

@@ -19,6 +19,8 @@
             lexical
             beam.packages.erlang_25.elixir-ls
             next-ls
+
+            sqlite
           ]
           ++ lib.optionals stdenv.isLinux [
             # For ExUnit Notifier on Linux.

lib/putzplan/tasks/task.ex

@@ -14,6 +14,11 @@ defmodule Putzplan.Tasks.Task do
     end
   end
 
+  sqlite do
+    table "tasks"
+    repo Putzplan.Repo
+  end
+
   # Attributes are the simple pieces of data that exist on your resource
   attributes do
     # Add an autogenerated UUID primary key called `:id`.

priv/repo/migrations/20250404184442_add_task_relation.exs

@@ -0,0 +1,11 @@
+defmodule Putzplan.Repo.Migrations.AddTaskRelation do
+  use Ecto.Migration
+
+  def change do
+    create table(:tasks, primary_key: false) do
+      add :id, :uuid, null: false, primary_key: true
+      add :description, :string, null: false
+      add :repetition_days, :integer, null: false
+    end
+  end
+end