fix(db): wrap migration in transaction

Add BEGIN/COMMIT transaction wrapper to migration to ensure
atomicity and prevent partial migration failures.

drizzle/0001_great_sentry.sql

@@ -1,3 +1,5 @@
+BEGIN;
+
 ALTER TABLE "authenticator" DISABLE ROW LEVEL SECURITY;--> statement-breakpoint
 DROP TABLE "authenticator" CASCADE;--> statement-breakpoint
 ALTER TABLE "verificationToken" RENAME TO "verification";--> statement-breakpoint
@@ -41,3 +43,5 @@ ALTER TABLE "user" ADD CONSTRAINT "user_email_unique" UNIQUE("email");
 ALTER TABLE "session" ALTER COLUMN "id" DROP DEFAULT;--> statement-breakpoint
 ALTER TABLE "verification" ALTER COLUMN "id" DROP DEFAULT;--> statement-breakpoint
 ALTER TABLE "account" ALTER COLUMN "id" DROP DEFAULT;
+
+COMMIT;