fix: use match_address when locking exclusive wallets

[long2ice]

Summary

• LockTradeAddress queried bep_order with column match_addr (wallet table name), but the order model column is match_address.
• This caused MySQL Error 1054: Unknown column 'match_addr' and made exclusive (address_locked) address checks always treat addresses as free.

Test plan

• Create a zero-amount / address-locked order and confirm no Unknown column 'match_addr' in logs
• Create a second exclusive order against the same wallet+trade_type while the first is waiting/confirming and confirm it returns「暂无可用钱包地址」
• Shared (non-locked) amount-based orders still allocate addresses as before