Lens Query Conf to be persisted in Finished_Queries store

Lens Conf passed while submitting a query isn't currently persisted in the finished_queries state store. Conf is available as long as query is in running or queued state and once the query completes and the same is evicted from memory, conf (fetched from DB) is no longer available. It would be useful to record the configurations that a user had used while submitting a query.