testing: Eth bridge deposit test failure.

[JoeGruffins]

Randomly on github.

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2025-11-22 16:06:32.057 [INF] mm_TEST: Deposited 1.000000 USDC. TxID = deposit_tx_id
2025-11-22 16:06:32.258 [INF] mm_TEST: Bridged 1.000000 USDC for deposit. TxID = bridge_tx_id
--- FAIL: TestDeposit (2.81s)
    --- FAIL: TestDeposit/bridge_deposit_-_USDC_Ethereum_to_USDC_Polygon (2.01s)
        exchange_adaptor_test.go:5105: bridge deposit - USDC Ethereum to USDC Polygon: unexpected dex balance for asset 966001. want &{Available:10000000 Locked:0 Pending:0 Reserved:0}, got &{Available:10000000 Locked:0 Pending:1000000 Reserved:0}
2025-11-22 16:06:34.266 [INF] mm_TEST: Withdrew 0.01000000 DCR

https://github.com/decred/dcrdex/actions/runs/19597917926/job/56125124367

[JoeGruffins]

Same error on github on master again today.