chore: Populate historic entries for new auction table

[sunce86]

Background

A new competition_auctions table is being introduced with PR #2980. While this PR will populate new entries, we also need to backfill historical data, as the necessary information already exists in other tables. This will allow us to drop other tables.

Details

Populate the auctions table using existing data from the following sources:

auction_id – from solver_competition table
block – from solver_competition table field auctionStartBlock
deadline – from settlement_scores table; if missing, set to 0 or use the value of block
order_uids – from solver_competition or auction_orders table
prices – from solver_competition or auction_prices table
surplus_capturing_jit_order_owners – from surplus_capturing_jit_order_owners table

[sunce86]

Executed manually on all staging and production databases.

Few hiccups on production databases where we had gaps due to failure to save auctions caused by #3088

Another hiccup was on mainnet production for auction 3278851 that somehow has solver_competition.json = null. For this one, I think it's fine to not have entry in competition_auctions.