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 non-interactive-provider linux rdm ADS build mrn constituents time-stamp volume pricing refinitiv-realtime-optimised stale tick-history-rest-api rfa OMM elektron-direct-feed refresh-message equities subscription exchanges sink-driven-source stress-test sequence service-dictionary encoding data-model docker performance ADH 64-bit api-limits service-id dispatch conflation trade documentation chain-ric quote search enum open-source load-balancing compile message commodities ipa fanout snapshot-pricing contributions rdf monitoring failover aws stream-id error service-name multi-threading unsubscribe events