Storage statistics not logged for a slow transaction

Slow operations extract the operation statistics from the storage engine and report them as part of logging and profiling. For a slow transaction, these storage statistics are meant to be cumulative over the operations performed in that transaction.

At the moment, we do not get any storage information for the slow transaction. It looks like we are not collecting the storage stats at the correct place, we might be collecting them too late, past the point where other metrics for a transaction get accumulated.