Testing database insert...

✅ Settings table exists

Deleted existing entries (if any): 1 rows

Running SQL:
INSERT INTO settings (group_id, group_name, exchange_rate, fee_rate) 
        VALUES ('-1002468037354', 'test_bot', 110, 0.00)

✅ INSERT successful!
Insert ID: 304

✅ Verification: Record found!
Array
(
    [id] => 304
    [group_id] => -1002468037354
    [group_name] => test_bot
    [exchange_rate] => 110.0000
    [fee_rate] => 0.00
    [to_pay_rate] => 108.0000
    [created_at] => 2026-01-15 07:05:43
    [updated_at] => 2026-01-15 07:05:43
)