SCHEMA: separate data and timestamps in database
SCHEMA: separate data and timestamps in database

 - Saves transforms going in and out.
 - Most insertions should happen via BlueSky or similar which can ensure
   that the data and timestamp keys stay in sync

tacaswell/metadataStore,ericdill/databroker,NSLS-II/metadatastore,NSLS-II/metadatastore,arkilic/metadatastore,tacaswell/metadataStore,hhslepicka/metadatastore,arkilic/metadatastore,ericdill/databroker,hhslepicka/metadatastore