Update instructions field in Recipe model to use Text type for better storage of longer content

backend/prisma/schema.prisma

@@ -63,7 +63,7 @@ model Recipe {
   id          Int                @id @default(autoincrement())
   name        String
   description String?
-  instructions String?
+  instructions String? @db.Text
   createdAt   DateTime           @default(now())
   updatedAt   DateTime           @updatedAt