generate script fix

generator/generate.cs

@@ -19,6 +19,7 @@ var rng = new Random(SEED);
 await using var conn = new MySqlConnection(DSN);
 await conn.OpenAsync();
 Console.WriteLine("Connected.");
+await new MySqlCommand("SET foreign_key_checks=0, unique_checks=0", conn).ExecuteNonQueryAsync();
 
 async Task Exec(string sql)
 {
@@ -480,9 +481,8 @@ while (bookingsDone < BOOKING_COUNT)
         bookingRows.Add($"({guestId},{hotelId},{D(checkin)},{D(checkout)},{S(status)},{DT(created)})");
     }
 
-    // Insert bookings and get the first inserted ID
-    long firstId = await ExecScalar("SELECT AUTO_INCREMENT FROM information_schema.tables WHERE table_schema='hotel_reservations' AND table_name='booking'");
     await Exec($"INSERT INTO booking (guest_id, hotel_id, date_from, date_to, status, created_at) VALUES {string.Join(',', bookingRows)}");
+    long firstId = await ExecScalar("SELECT LAST_INSERT_ID()");
 
     // Re-derive checkin/nights from the same rng sequence is impossible after the fact,
     // so re-parse from inserted rows to build room_bookings