Migrate user ops fields to text (#179)

Author: adam-maj

src/prisma/migrations/20230926004337_update_user_ops/migration.sql

@@ -0,0 +1,4 @@
+ALTER TABLE "transactions"
+ALTER COLUMN "callGasLimit" SET DATA TYPE TEXT,
+ALTER COLUMN "preVerificationGas" SET DATA TYPE TEXT,
+ALTER COLUMN "verificationGasLimit" SET DATA TYPE TEXT;