After "mix phx.gen.json BiddingRounds BiddingRound bidding_rounds round_number:integer running:boolean --no-scope".

priv/repo/migrations/20260122104608_create_bidding_rounds.exs

@@ -0,0 +1,13 @@
+defmodule BeetRoundServer.Repo.Migrations.CreateBiddingRounds do
+  use Ecto.Migration
+
+  def change do
+    create table(:bidding_rounds, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :round_number, :integer
+      add :running, :boolean, default: false, null: false
+
+      timestamps(type: :utc_datetime)
+    end
+  end
+end