Adding logs to monitor db query execution time in dab

[rohkhann]

Why make this change?

We want to understand the graphql overhead that is being added while execution of a query.

What is this change?

this query adds the time it took for the query to execute on the db. Total execution time - time query took on db should give us the graphql overhead.

How was this tested?

Since this is only a timer addition and no logical change. existing unit tests should cover code.