eta-api elektron elektron-sdk rrt refinitiv-realtime elektron-transport-api java rssl c++ rcc-api connection trep source-directory symbology batch ssl refinitiv-real-time reactor api rics log-in fields c Service eikon token non-interactive-provider linux rdm ADS market-by-price market-feed callback status consumer rcc DACS elektron-data-dictionary api-limits service-id dispatch conflation trade documentation chain-ric quote search enum open-source load-balancing refinitiv-realtime-sdk compile message commodities ipa fanout snapshot-pricing contributions rdf monitoring failover aws stream-id error build service-name multi-threading unsubscribe events 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