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