Set SPDX headers

Schultzer · Schultzer · commit 6afcea12614b · 2025-10-18T16:05:07.000-04:00
diff --git a/lib/pool.ex b/lib/pool.ex
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: 2025 DBVisor
+
 defmodule SQL.Pool do
   @moduledoc false
   use GenServer
