Use Drizzle adapter and Drizzle CLI auth migrations

drizzle.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig } from 'drizzle-kit';
+
+const databaseUrl = process.env.DATABASE_URL?.trim();
+
+if (!databaseUrl) {
+  throw new Error('DATABASE_URL is required to run Drizzle migrations.');
+}
+
+export default defineConfig({
+  schema: './lib/server/db/schema.ts',
+  out: './drizzle',
+  dialect: 'postgresql',
+  dbCredentials: {
+    url: databaseUrl
+  },
+  strict: true,
+  verbose: true
+});