* market: use `pending` blocktag when querying onchain state
* clock: use wall clock in integration tests
reason: we'll need to wait for the next period in
integration tests, and we can't do that if the
time doesn't advance
* clock: remove unused field
* integration: use pending block time to get current time
* clock: fix on-chain clock for hardhat
Only use 'latest' block for updates
Only update the first time you see a block
* integration: do not start tests with a very outdated block
* integration: allow for longer expiry period