property value as Union type

priv/repo/migrations/20250528163901_initial_migration.exs

@@ -11,7 +11,7 @@ defmodule Mv.Repo.Migrations.InitialMigration do
     create table(:property_types, primary_key: false) do
       add :id, :uuid, null: false, default: fragment("gen_random_uuid()"), primary_key: true
       add :name, :text, null: false
-      add :type, :text, null: false
+      add :value_type, :text, null: false
       add :description, :text
       add :immutable, :boolean, null: false, default: false
       add :required, :boolean, null: false, default: false
@@ -21,7 +21,7 @@ defmodule Mv.Repo.Migrations.InitialMigration do
 
     create table(:properties, primary_key: false) do
       add :id, :uuid, null: false, default: fragment("gen_random_uuid()"), primary_key: true
-      add :value, :text
+      add :value, :map
       add :member_id, :uuid
       add :property_type_id, :uuid
     end

priv/repo/seeds.exs

@@ -15,14 +15,35 @@ alias Mv.Membership
 for attrs <- [
       %{
         name: "Vorname",
-        type: "string",
+        value_type: :string,
         description: "Vorname des Mitglieds",
         immutable: true,
         required: true
       },
+      %{
+        name: "Nachname",
+        value_type: :string,
+        description: "Nachname des Mitglieds",
+        immutable: true,
+        required: true
+      },
+      %{
+        name: "Geburtsdatum",
+        value_type: :date,
+        description: "Geburtsdatum des Mitglieds",
+        immutable: true,
+        required: true
+      },
+      %{
+        name: "Bezahlt",
+        value_type: :boolean,
+        description: "Status des Mitgliedsbeitrages des Mitglieds",
+        immutable: true,
+        required: true
+      },
       %{
         name: "Email",
-        type: "string",
+        value_type: :string,
         description: "Email-Adresse des Mitglieds",
         immutable: true,
         required: true