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