Refactor and add securities controller

priv/repo/migrations/20250128134037_create_securities.exs

@@ -0,0 +1,17 @@
+defmodule Tradex.Repo.Migrations.CreateSecurities do
+  use Ecto.Migration
+
+  def change do
+    create table(:securities, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :name, :string
+      add :ticker, :string
+      add :wkn, :string
+      add :isin, :string
+      add :expiration_date, :date
+      add :strike_price, :decimal
+
+      timestamps(type: :utc_datetime)
+    end
+  end
+end