# Description
Indexing refunds is not strictly necessary to have all relevant state
for building the next auction. That's why it's okay to move that logic
off of the critical path.
This should resolve the start up issues we've been seeing on arbitrum
staging where we have to reindex lots of blocks because the blocktime is
so fast and we don't do refunds regularly. However, we should still find
a better way to store the blocks we already indexed to avoid these
issues in general.

# Changes
Index refund events in a separate background task again.