init commit

priv/repo/migrations/20260413000001_create_projection_versions.exs

@@ -0,0 +1,12 @@
+defmodule WorkloadService.Repo.Migrations.CreateProjectionVersions do
+  use Ecto.Migration
+
+  def change do
+    create table(:projection_versions, primary_key: false) do
+      add(:projection_name, :text, primary_key: true)
+      add(:last_seen_event_number, :bigint)
+
+      timestamps(type: :naive_datetime_usec)
+    end
+  end
+end