Move tx gas limit to driver config

testsssss

baseline balances tempo

remove old crap again

testing erc1271

Fix refunder wallet (#3779)

# Description
After the CoWSwapEthFlow SC was migrated to alloy, we've started
receiving the following errors:
```
2025-10-14T16:46:08.171Z  WARN refunder: Error while refunding ethflow orders: local usage error: Missing signing credential for 0x0214aE5fD178986fA18ff792e0b995Dc6a78cD56  
Caused by:     Missing signing credential for 0x0214aE5fD178986fA18ff792e0b995Dc6a78cD56
```
That basically means that our refunder doesn't work.

The reason for that is that the refunder's private key wasn't set
properly in the alloy provider. This PR fixes it.

## How to test
Probably not easy.

testing no batching delay

fixup

Spawn main future in worker task

Migrate from `auction_participans` to `proposed_solutions` table (#3766)

# Description
The `auction_participans` table has become obsolete, since the same data
is now stored in the `proposed_solutions`. This PR migrates usage to the
latter table. The migration script will be a part of #3753, since this
is a breaking change, which requires gradual deployment to avoid panics
when running 2 auctions in parallel.