eta-api elektron-sdk rrt elektron refinitiv-realtime elektron-transport-api java c++ rssl reactor rcc-api source-directory connection trep batch symbology fields refinitiv-real-time c ssl api consumer log-in rics Service eikon DACS elektron-data-dictionary refinitiv-realtime-sdk token ADS build linux non-interactive-provider market-by-price rdm rcc market-feed callback status exchanges conflation stress-test service-dictionary chain-ric data-model enum open-source message api-limits commodities service-id fanout contributions dispatch trade monitoring quote failover documentation search aws load-balancing compile unsubscribe ipa constituents snapshot-pricing volume rdf pricing refinitiv-realtime-optimised tick-history-rest-api stream-id error rfa service-name refresh-message subscription multi-threading events mrn time-stamp sink-driven-source stale sequence encoding docker OMM performance equities ADH elektron-direct-feed 64-bit