Migration: audit entries (#5581)

* Migration: audit entries

* Put migration behind EE conditional

priv/repo/migrations/20250708102205_audit_entries.exs

@@ -0,0 +1,28 @@
+defmodule Plausible.Repo.Migrations.AuditEntries do
+  use Ecto.Migration
+
+  import Plausible.MigrationUtils
+
+  def change do
+    if enterprise_edition?() do
+      create table(:audit_entries, primary_key: false) do
+        add(:id, :uuid, primary_key: true)
+        add :name, :string, null: false
+        add :entity, :string, null: false
+        add :entity_id, :string, null: false
+        add :meta, :map, default: %{}
+        add :change, :map, default: %{}
+        add :user_id, :integer
+        add :team_id, :integer
+        add :datetime, :naive_datetime_usec, null: false
+        add :actor_type, :string, null: false
+      end
+
+      create index(:audit_entries, [:entity])
+      create index(:audit_entries, [:entity_id])
+      create index(:audit_entries, [:user_id])
+      create index(:audit_entries, [:team_id])
+      create index(:audit_entries, [:datetime])
+    end
+  end
+end