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