Consider whether we can we push metadata and s3 data in parallel.

[purplefox]

Can we register and push data to s3 in parallel in order to reduce overall produce latency?

Consider failure modes:

If the reg fails and the push succeeds we just retry the reg until it works

If the push fails and the reg succeeds…. we will retry the push but if agent crashes we will end up with a table entry in the LSM but no corresponding table. when a query occurs against the LSM and selects that table entry, the iterator will try and get the table and fail - we can just ignore it.

So. possibly we can register and push to S3 in parallel. Needs more investigation.