- Add individual indexes for v2_user table (t, online_count, created_at)
- Add individual indexes for v2_order table (created_at, status, total_amount, commission fields)
- Add individual indexes for v2_stat_server table (server_id, record_at, u, d)
- Add individual indexes for v2_stat_user table (u, d)
- Add individual indexes for v2_commission_log table (created_at, get_amount)
- Add individual indexes for v2_ticket table (status, created_at)
This change improves query flexibility and maintainability by using single column indexes
instead of composite indexes. Each field can now be queried independently with optimal
performance.
