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