Bug: proceeds are calculated before payout invoice is settled

[alicecoordinator]

Describe the bug
In Logics.confirm_fiat, the proceeds are calculated, considering the payout amount and the routing fees, but this calculation might happen before the payout invoice is settled, which causes this logic to use 0 as routing fee.

The proceeds are also used to calculate the dev fund donation, which might cause the coordinator to operate on a loss.

Expected behavior
Proceeds should only be calculated once the payout invoice is settled.

Additional context
For one of my orders I can see in the logs: "proceedings are incremented by 37 Sats, totalling 37 Sats", but if I calculate the expression int(order.trade_escrow.num_satoshis - payout_sats), I get 35. The fees were Decimal('1.444').

On another order I see "proceedings are incremented by 355 Sats, totalling 355 Sats", but the actual proceeds were 132. The dev fund donation was 71, but it should have been 26.

[gabbygator184]

Maybe the error is here:

robosats/api/logics.py

Line 1899 in dc98a8e

payout_sats = order.payout.num_satoshis + order.payout.fee

When the order is concluded, the dev fund donation is calculated and order.payout.fee is still zero.
order.payout.fee should be changed to order.payout.routing_budget_sats

Coordinator profits would increase due to this difference (order.payout.routing_budget_sats - order.payout.fee), but this is related to routes in the Lightning Network. The donation should be calculated based on the fee charged between makers and takers.