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