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